EP0531502A1 - Device for authorized actuation of locking means - Google Patents

Device for authorized actuation of locking means

Info

Publication number
EP0531502A1
EP0531502A1 EP19920908882 EP92908882A EP0531502A1 EP 0531502 A1 EP0531502 A1 EP 0531502A1 EP 19920908882 EP19920908882 EP 19920908882 EP 92908882 A EP92908882 A EP 92908882A EP 0531502 A1 EP0531502 A1 EP 0531502A1
Authority
EP
European Patent Office
Prior art keywords
digits
transmitter
receiver
signal
random
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19920908882
Other languages
German (de)
French (fr)
Inventor
Edward Bruneau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0531502A1 publication Critical patent/EP0531502A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/0023—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks with encription of the transmittted data signal
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
    • G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00785—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by light

Definitions

  • the present invention relates to the field of security of goods or people and more specifically the management of regulated access to an installation.
  • Regulated access is understood to mean any device the actuation of which is subject to authorization, which manifests itself most of the time by the possession of a code or a coded device.
  • These include, in particular, all anti-theft installations (buildings, vehicles, etc.) and all protection installations in certain sensitive areas of a company, given the confidential nature of the equipment or information There, all the security installations in terms of people limiting access to certain dangerous areas to informed and authorized people ....
  • a vehicle that o wishes to protect against theft there are currently several devices which, without absolutely preventing the theft of a vehicle, provide the thief with greater or lesser resistance depending on the degree of complexity of the device.
  • Some of them are of the purely mechanical type allowing a locking of an essential organ of the vehicle or the removal of an organ of the steering wheel or gear lever type. Others are of the electronic type, only commanding the commissioning of certain vehicle components (general power supply circuit, etc.) only after receiving a code, generally entered by keyboard. These latter devices, in general associated with alarms, are of high cost and of relatively long installation. In addition, they imply for a given vehicle, to correctly transmit to all drivers, the access code which forces each driver to make a memory effort with the risk of loss or leakage about this code.
  • the present invention intends to remedy this drawback by proposing a much easier device. to be installed and responding to a code whose placement and development at random does not make it possible to discover it or even to know it.
  • the subject of the invention is therefore a device for activating the authorized organs of condemnation of a facility with regulated access, comprising a transmitter of coded signals and a receiver of these signals comprising a logic unit connected to the locking devices to control them in response to the received signal, in which the logic unit and the transmitter are charged with an identification number formed by a plurality of random numbers, with a first program of processing developing a key number resulting from a relationship between these digits, and from a second program defining a determined number of digits, the transmitter having an encoder comprising a sequence generator of a preset number of random digits and a program of coding defining a number ' code resulting from a relation between the key number and each of the digits of the sequence located at each of the relative positions defined by the digits é developed by the second program with the exception of at least one digit at the position of which the code number is placed, the signal emitted being the image of the pseudo-random sequence thus created, while the logic unit
  • the logic unit of the receiver is equipped with a transmitter for transmitting, before action on the locking organs, a coded signal to the transmitter when the coding relationship is verified, the transmitter on reception of this code signal transmitting a second pseudo-random sequence comprising a second code number located at one of the relative locations defined by the digits and in relation to the code signal, this second sequence being received and decoded by the logic unit which acts in response on the locking members.
  • the logic unit comprises a memory for recording the __ last signals received and a comparator of the signal processed with each of the recorded signals, outputting a signal prohibiting the control of the locking members. , in case of equality noted by the comparator.
  • the code thus installed in the device is unknown to everyone, even the manufacturer, so that it is not possible to discover or reproduce it, and there is no need to transmit it; it suffices to transmit the signal transmitter.
  • the receiver signal code may include an element (for example a three-digit number) which changes with each unlocking operation. This number is recorded by the transmitter and will constitute for the next unlocking an additional element of recognition of the transmitter by the receiver which will have kept in memory the digit previously transmitted.
  • the receiver is placed in a volume of the installation the access of which is controlled by one of the above-mentioned locking members and is connected to the transmitter through an optical fiber.
  • the coded signal consists of an infrared rayonne ⁇ ment.
  • the device includes means for simultaneously loading the identification number in the receiver and in a plurality of transmitters, each of which constitutes an access key to the installation.
  • the locking members are normally in the service position, the command issued by the receiver being a command to lift the convictions, which remains effective for a limited time. if no other action from the authorized operator takes over. This action is generally the establishment of the general electrical contact of the vehicle. However, for maintenance or repair operations, the user needs to entrust his vehicle to a garage. Under these conditions, by simple appropriate software installed in the receiver, a new unlocking command before the limited time has elapsed is interpreted by the receiver as a general and unlimited unlocking command, that is to say that on receipt of this second command, the receiver inhibits the means for restoring the locking members in their active position.
  • the device of the invention comprises a transmitter 1 and a receiver 2, the transmitter supplying the receiver with a coded signal 3 (for example in the form of radiation emitted by an infrared diode 4).
  • a coded signal 3 for example in the form of radiation emitted by an infrared diode 4
  • This signal will advantageously be collected by an optical fiber 5 leading to an amplifier 6 of the receiver.
  • the output of the amplifier is collected by a controller 7 which analyzes the signal and its decoding and which emits at output 8 control signals in the direction of the locking members to be actuated (not shown), by means of interface 9 and mixing circuits 10.
  • the controller 7 receives input signals at input 11 informing it of the state of the locking members that it has actuated.
  • the controller 7 has an excitation output 12 for one or more light-emitting diodes 13 and 14 of different colors, forming indicators of operation (or state) of the various locking devices or other components of the device such as, for example, the energy source.
  • the latter comprises at least one battery 15 which, in the case of an anti-theft device of a motor vehicle, may be the storage battery of the vehicle itself, coupled with a small backup battery 16.
  • the transmitter 1 comprises an encoder 17, a processing unit 18 and emission control (the switch 18a_ symbolizing manual action), an interface circuit 19 between the unit 18 and the diode 4 and an interface circuit 20 to allow the encoder to be loaded as will be explained below -after.
  • the logic controller 7 of the receiver consists of a microprocessor comprising two programs, one defining a key number (c) and the other defining a given number (n) of digits, from a plurality of (p) random digits loaded in an electrically programmable and erasable memory 21.
  • the plurality (p) of digits loaded in the memory 21 comprises any 4 digits determined by a random digit generator that the microprocessor includes or which is connected to it to load the memory.
  • the microprocessor defines a determined number n of digits. This number will preferably be at least equal to four.
  • a simple algorithm consists in deciding that each of these four digits is equal to the four digits composing the identification number. These four digits are also memorized in memory 21.
  • the microprocessor 7 loads on the one hand the key number (c) and, on the other hand, the (n) digits calculated by the second algorithm, in an electrically programmable and erasable memory belonging to the encoder 17 / processing unit 17 assembly.
  • the encoder also comprises a generator of random digits capable of generating in the direction of the processing unit 18 a sequence of (t) digits any (for example 16 digits) on each manual command of the transmitter (closing of the switch 18a).
  • the processing unit comprises an algorithm by which a relation is established between the digits of the sequence (t) which are, in this sequence, at the position defined by the (n) stored digits, with the exception of at least one, and the key number (c).
  • the result of this relationship called number code (r) is then written to the location of the digit that was not taken into account in the relationship.
  • the sequence of (t) random digits becomes a pseudo-random sequence which is transformed by the interface circuit 19 into a coded excitation signal from the diode 4 emitting infrared radiation.
  • this radiation is transformed by circuit 6 into a coded electrical signal where it is analyzed by logic unit or microprocessor 7 which contains an algorithm similar to that of the processing of the signal in the transmitter, c that is to say allowing to isolate in the pseudo-random series received the n significant digits defined by their position in the series and to note (or not) that they verify the relation which combines them with the key number.
  • the unit 7 sends a control order via its outputs 8 in the direction of the locking members to be actuated in the direction of their release. Otherwise, these organs are not actuated and remain in their locked position.
  • the identification number is 2 3 4 5
  • the n digits determined by the second program or algorithm are 2, 3, 4, and 5.
  • the receiver and the transmitter have in memory the key number (c) 14 and the four digits 2, 3, 4, 5.
  • the random generator of the transmitter is activated 18a . by the user.
  • the 16 digits generated are for example: 1 2 3 6 2 8 7 9 5 2 6 3 7 8 4 1.
  • the transmitted pseudo-random sequence is then 1
  • This coding has the advantage of not being easily decryptable, because even if the principle is known, the identification number is assigned to the device in a blind manner.
  • the device according to the invention offers two simple solutions to this fraud.
  • the first is by means of .ne memory unit provided in the receiver 7, to SAVE r er each of the received signals or at least a large number of c .ow recently received (e.g. the last five cents), and comparing each new signal to this collection of old signals. If there is identity of signals, the action of logic unit 7 on the locking devices is inhibited; this inhibition may occur despite an "authorized"signal; in this case the operator renews the transmission and in all probability, the new code will be different from all those recorded. On the other hand, the fraudulent repetition of the signal identical to itself will not produce the desired unlocking.
  • the second parry resides in a reset of the receiving and transmitting device by loading one and the other with a new identification number formed of random digits.
  • recognition of the transmitted signal can lead to transmission by the receiver, by means of a secondary transmitter 7a . of coded radiation, forming a return code signal and comprising a random series of digits which is received via the optical fiber 5 by a secondary receiver 25 connected to the processing unit 18 of the transmitter.
  • the series of numbers received by the transmitter 1 is combined with the series previously transmitted to be transformed into a new coded signal (image of a series of digits) that the receiver 2 is capable of recognizing as being the signal validating the authorization for unlocking.
  • This bidirectional exchange of signals makes it possible to avoid fraud resulting from the simple emission of a copy of a valid signal while being able to dispense with the recording of the numerous previous signals.
  • the receiver 2 transmits a number towards the transmitter 1 (for example the order number corresponding to the number of unlocking operations already carried out), this number then being written to a memory 20 of the transmitter. tor.
  • the transmitter upon actuation of the switch 18a . , will transmit this number to the receiver, via the optical fiber 5 which will compare it with the value which it will have kept in memory.
  • This comparison constitutes a first degree of security in the sense that if it is not convincing, the continuation of the sequence is inhibited, and the unlocking procedure is blocked.
  • This makes it possible to combat fraud consisting in implanting in a non-dedicated transmitter the data copied from an authentic transmitter. Indeed, the fraudulent issuer being, by hypothesis, used after the authentic issuer has been used several times, the above-mentioned order number will have changed.
  • the initial signal transmitted from the transmitter to the receiver must, at the start of each exchange, include an element identifying the transmitter in question so that the receiver assigns it, during the signal processing, the serial number which belongs to it and which is stored apart from the serial number assigned to each of the other transmitters.
  • the transmitter of the invention is mobile, that is to say carried by the operator.
  • the transmitter To act on the device, the transmitter must be approached at the end 5a of the optical fiber 5.
  • being close to the fiber requires only a very low transmitting power and therefore low energy consumption on board the transmitter.
  • the end 5a of the fiber can be very discreet and already constitute an opportunity for the fraudster to waste time.
  • the indicator light can constitute the indicator light, outside the installation, of the state of the locking members.
  • it can be bidirectional and by a mirror 24 transparent to infrared, collect inside the receiver 2, the light emission of one or more diodes controlled by the logic unit 7 which has the information on the state of these organs.
  • the invention naturally finds numerous applications in the field of the security of goods or people.
  • the receiver 2 is housed in the engine space of the bodywork and the optical fiber ends up at the dashboard by borrowing without difficulty one of the cable passages provided between the tackle and the engine space.
  • the locking devices there will be a general electric circuit breaker and a locking of the closing of the engine cover so as to prevent access to the vehicle engine and to the receiver of the device.
  • the energy required for the receiver will be that supplied by the vehicle battery with a backup battery, in the event of failure of the main battery. It should be noted that security systems will be implemented to unlock the access to the engine in the event of a breakdown.
  • the actuation of the locking devices by the receiver 2 can be temporary and stop after a determined time if this "order" of unlocking is not relayed by a permanent instruction originating for example the closing of the general electrical switch (contact) of the vehicle.
  • the light signal present at the end of the optical fiber 5a could be flashing green.
  • it must be allowed to access the vehicle components in the event of breakdown or maintenance, ignition off. • is why during the time delay and in another alternative embodiment of the invention, it is possible to control the total inhibition of the locking members or their continuation without time limit in their open state. To obtain this result, it is sufficient for example to actuate the transmitter a second time.
  • the validation procedure for this signal is identical to that described above and leads the logical unit of the receiver to transmit a control signal inhibiting the locking means, in the same way as the action of switching on the ignition in the case of the application of the invention to a motor vehicle.
  • This particular command obtained from the receiver, results from a particular program introduced into the receiver and capable of being activated only during the limited unlocking time.
  • the permanent unlocking would then be signaled by a continuous green light signal present at the end 5a_ of the optical fiber.
  • This transmitter can advantageously be incorporated in the key fob for the vehicle opening and contact keys.
  • a second application of the invention is the production of a reliable electronic lock for residential or professional premises.
  • the invention finds a third application in the management of regulated access to certain danger areas * _us or under high protection. It is indeed possible to create access degrees with an identic initialization of all the receivers whose algorithms are different so that from an identical identification number it is possible to generate codes including the complete * tee increases in inverse ratio to the permissiveness of access, the most complex code being nevertheless operative with regard to the "lower" accesses.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)

Abstract

Le dispositif comporte un émetteur (1) de signaux (3) codés et un récepteur (2) de ces signaux comprenant une unité logique (7) reliée aux organes de condamnation pour les commander en réponse au signal reçu, l'unité logique (7) et l'émmetteur (1) sont chargés d'un numéro d'identification formé d'une pluralité (p) de chiffres aléatoires avec un premier programme de traitement élaborant un nombre clé (c) résultant d'une relation entre ces chiffres, et avec un second programme définissant un nombre (n) déterminé de chiffres, l'émtteur (1) ayant un codeur (17, 18) comportant un générateur de séquences d'un nombre (t) pré-établi de chiffres aléatoires et un programme de codage définissant un nombre code (r) résultant d'une relation entre le nombre clé (c) et chacun des chiffres de la séquence (t) situé à chacune des positions relatives définies par les chiffres (n) élaborés par le second programme, à l'exception d'au moins un chiffre à la position duquel le nombre code (r) est placé, le signal émis étant l'image de la séquence pseudo-aléatoire ainsi créée. Le récepteur par un programme approprié décode cette séquence.The device comprises a transmitter (1) of coded signals (3) and a receiver (2) of these signals comprising a logic unit (7) connected to the locking devices to control them in response to the received signal, the logic unit (7 ) and the transmitter (1) are responsible for an identification number formed by a plurality (p) of random digits with a first processing program elaborating a key number (c) resulting from a relationship between these digits, and with a second program defining a determined number (n) of digits, the transmitter (1) having an encoder (17, 18) comprising a sequence generator of a preset number (t) of random digits and a program coding defining a code number (r) resulting from a relationship between the key number (c) and each of the digits of the sequence (t) located at each of the relative positions defined by the digits (n) produced by the second program, with the exception of at least one digit at the position of which the number code (r) is placed, if gnal emitted being the image of the pseudo-random sequence thus created. The receiver by an appropriate program decodes this sequence.

Description

Dispositif d'actionnement autorisé des organes de condamnation d'une installation. La présente invention concerne le domaine de la sécurité des biens ou des personnes et plus spécialement la gestion des accès réglementés à une installation. Authorized actuation device for the locking devices of an installation. The present invention relates to the field of security of goods or people and more specifically the management of regulated access to an installation.
Il faut entendre par accès réglementé tout disposi- tif dont 1 ' actionnement est soumis à une autorisation, celle- ci se manifestant la plupart du temps par la détention d'un code ou d'un dispositif codé. Il s'agit notamment de toutes les installations anti-vol (immeubles, véhicules...) de toutes les installations de protection de certaines zones sensibles d'une entreprise, étant donné le caractère confi¬ dentiel du matériel ou des informations qui s'y trouvent, de toutes les installations de sécurité en matière de personnes limitant l'accès de certaines zones dangereuses à des personnes averties et autorisées.... En prenant l'exemple d'un véhicule que l'o souhaite protéger contre le vol, il existe actuellemen plusieurs dispositifs qui, sans empêcher de manière absolu le vol d'un véhicule, opposent au voleur une résistance plu ou moins importante selon le degré de complexité du disposi tif.Regulated access is understood to mean any device the actuation of which is subject to authorization, which manifests itself most of the time by the possession of a code or a coded device. These include, in particular, all anti-theft installations (buildings, vehicles, etc.) and all protection installations in certain sensitive areas of a company, given the confidential nature of the equipment or information There, all the security installations in terms of people limiting access to certain dangerous areas to informed and authorized people .... Taking the example of a vehicle that o wishes to protect against theft, there are currently several devices which, without absolutely preventing the theft of a vehicle, provide the thief with greater or lesser resistance depending on the degree of complexity of the device.
Certains d'entre eux sont de type purement mécani que permettant un verrouillage d'un organe essentiel d véhicule ou le retrait d'un organe du genre volant ou levie de vitesse. D'autres sont de type électronique ne commandan la mise en service de certains organes du véhicule (circui d'alimentation générale...) qu'après avoir reçu un code, e général introduit par clavier. Ces derniers dispositifs, e général associés à des alarmes, sont d'un coût élevé et d'un mise en place assez longue. En outre, ils impliquent pour u véhicule donné, de transmettre correctement à tous se conducteurs, le code d'accès ce qui contraint chaque conduc teur à un effort de mémoire avec les risques de perte ou d fuite à propos de ce code.Some of them are of the purely mechanical type allowing a locking of an essential organ of the vehicle or the removal of an organ of the steering wheel or gear lever type. Others are of the electronic type, only commanding the commissioning of certain vehicle components (general power supply circuit, etc.) only after receiving a code, generally entered by keyboard. These latter devices, in general associated with alarms, are of high cost and of relatively long installation. In addition, they imply for a given vehicle, to correctly transmit to all drivers, the access code which forces each driver to make a memory effort with the risk of loss or leakage about this code.
La présente invention entend remédier à ce inconvénients en proposant un dispositif beaucoup plus facil à installer et répondant à un code dont la mise en place et 1 ' élaboration de manière aléatoire ne permet pas de le découvrir ni même de le connaître.The present invention intends to remedy this drawback by proposing a much easier device. to be installed and responding to a code whose placement and development at random does not make it possible to discover it or even to know it.
A cet effet, l'invention a donc pour objet un dispositif d' actionne ent autorisé des organes de condamna¬ tion d'une installation à accès réglementé, comportant un émetteur de signaux codés et un récepteur de ces signaux comprenant une unité logique reliée aux organes de condamna¬ tion pour les commander en réponse au signal reçu, dans lequel l'unité logique et l'émetteur sont chargés d'un numéro d'identification formé d'une pluralité de chiffres aléatoi¬ res, d'un premier programme de traitement élaborant un nombre clé résultant d'une relation entre ces chiffres, et d'un second programme définissant un nombre déterminé de chiffres, l'émetteur ayant un codeur comportant un générateur de séquences d'un nombre préétabli de chiffres aléatoires et un programme de codage définissant un nombre ' code résultant d'une relation entre le nombre clé et chacun des chiffres de la séquence situé à chacune des positions relatives définies par les chiffres élaborés par le second programme à l'excep¬ tion d'au moins un chiffre à la position duquel le nombre code est placé, le signal émis étant l'image de la séquence pseudo-aléatoire ainsi créée, tandis que l'unité logique possède un décodeur pour constater ou non, par un programme de décodage semblable au programme de codage, que la relation de codage est vérifiée, et actionner ou non en conséquence les organes de condamnation.To this end, the subject of the invention is therefore a device for activating the authorized organs of condemnation of a facility with regulated access, comprising a transmitter of coded signals and a receiver of these signals comprising a logic unit connected to the locking devices to control them in response to the received signal, in which the logic unit and the transmitter are charged with an identification number formed by a plurality of random numbers, with a first program of processing developing a key number resulting from a relationship between these digits, and from a second program defining a determined number of digits, the transmitter having an encoder comprising a sequence generator of a preset number of random digits and a program of coding defining a number ' code resulting from a relation between the key number and each of the digits of the sequence located at each of the relative positions defined by the digits é developed by the second program with the exception of at least one digit at the position of which the code number is placed, the signal emitted being the image of the pseudo-random sequence thus created, while the logic unit has a decoder to determine whether or not, by a decoding program similar to the coding program, that the coding relationship is verified, and whether or not to actuate the locking members accordingly.
Pour éviter 1 'actionnement frauduleux par recopie d'un code valable et émission de celui-ci en direction du récepteur, il existe plusieurs moyens. L'un d'eux consiste en ce que l'unité logique du récepteur est équipée d'un émetteur pour transmettre, avant action sur les organes de condamna¬ tion, un signal codé à l'émetteur quand la relation de codage est vérifiée, l'émetteur à réception de ce signal code émettant une seconde séquence pseudo-aléatoire comportant un second nombre code situé à l'un des emplacements relatifs définis par les chiffres et en relation avec le signal code, cette seconde séquence étant reçue et décodée par l'unité logique qui agit en réponse sur les organes de condamnation. Un autre moyen consiste en ce que l'unité logique comporte une mémoire d'enregistrement des __ derniers signaux reçus et un comparateur du signal traité avec chacun des signaux enregistrés, émettant en sortie un signal d'interdic¬ tion de commande des organes de condamnation, en cas d'éga- lité constatée par le comparateur.There are several ways to avoid fraudulent activation by copying a valid code and sending it to the receiver. One of them consists in that the logical unit of the receiver is equipped with a transmitter for transmitting, before action on the locking organs, a coded signal to the transmitter when the coding relationship is verified, the transmitter on reception of this code signal transmitting a second pseudo-random sequence comprising a second code number located at one of the relative locations defined by the digits and in relation to the code signal, this second sequence being received and decoded by the logic unit which acts in response on the locking members. Another means is that the logic unit comprises a memory for recording the __ last signals received and a comparator of the signal processed with each of the recorded signals, outputting a signal prohibiting the control of the locking members. , in case of equality noted by the comparator.
Le code ainsi installé dans le dispositif est inconnu de tous, même du constructeur, si bien qu'il n'est pas possible ni de découvrir, ni de le reproduire, et qu'il n'est pas besoin de le transmettre ; il suffit en effet de transmettre l'émetteur du signal.The code thus installed in the device is unknown to everyone, even the manufacturer, so that it is not possible to discover or reproduce it, and there is no need to transmit it; it suffices to transmit the signal transmitter.
Il existe un autre niveau de fraude, à savoir la recopie complète du contenu des mémoires appartenant à 1 ' électronique de 1 ' émetteur donc avec les algorithmes et programmes qu'elles contiennent. Cette copie transplantée dans un émetteur non dédié permet de rendre cet émetteur opérationnel. Pour lutter contre cette fraude le signal code du récepteur peut comporter un élément (par exemple un nombre à trois chiffres) qui change à chaque opération de déver¬ rouillage. Ce nombre est enregistré par l'émetteur et constituera pour le prochain déverrouillage un élément supplémentaire de reconnaissance de l'émetteur par le récepteur qui aura gardé en mémoire le chiffre précédemment émis. On comprend qu'ainsi un émetteur chargé frauduleusement de tous les éléments d'un émetteur authentique ne pourra plus être reconnu par 1 -écepteur, si ce dernier a été, entre la copie et l'action de l'émetteur frauduleux, commandé une, deux ou trois fois par 1 ' émetteur authentique car le nombre du signal code de l'émetteur frauduleux ne correspond plus à celui en mémoire du récepteur. On notera à cet égard que s'il existe plusieurs émetteurs authentiques pour un récepteur, il faut que ce dernier reconnaisse chacun des émetteurs pour, lors de l'élaboration du signal code, se référer à une mémoire, contenant ce chiffre variable, dédiée à l'émetteur en cause. Cette discrimination est réalisée au moment de la première émission de l'émetteur, qui contient un signe d'identification par le récepteur de l'émetteur actif parmi les émetteurs authentiques possibles.There is another level of fraud, namely the complete copying of the content of the memories belonging to the electronics of the transmitter, therefore with the algorithms and programs that they contain. This copy transplanted into a non-dedicated transmitter makes this transmitter operational. To combat this fraud, the receiver signal code may include an element (for example a three-digit number) which changes with each unlocking operation. This number is recorded by the transmitter and will constitute for the next unlocking an additional element of recognition of the transmitter by the receiver which will have kept in memory the digit previously transmitted. It is understood that thus an emitter fraudulently charged with all the elements of an authentic emitter will no longer be able to be recognized by 1 receiver, if the latter has been, between the copy and the action of the fraudulent emitter, ordered one, two or three times with one authentic transmitter because the number of the signal code of the fraudulent transmitter no longer corresponds to that in memory of the receiver. It should be noted in this regard that if there are several authentic transmitters for a receiver, it the latter must recognize each of the transmitters so, when developing the code signal, refer to a memory, containing this variable figure, dedicated to the transmitter in question. This discrimination is carried out at the time of the first transmission of the transmitter, which contains a sign of identification by the receiver of the active transmitter among the possible authentic transmitters.
Dans un mode de réalisation préféré de l'invention et notamment appliqué aux antivols de véhicule automobile, le récepteur est placé dans un volume de l'installation dont l'accès est commandé par l'un des organes de condamnation susdits et est relié à l'émetteur par l'intermédiaire d'une fibre optique. Le signal codé est constitué par un rayonne¬ ment infrarouge. Ainsi, il faut approcher l'émetteur de 1 ' extrémité libre de la fibre optique pour y faire pénétrer le rayonnement infrarouge. Cette disposition est un facteur supplémentaire antifraude car, le signal émis n'est pas puissant et ne rayonne pas dans un espace important autour du véhicule. Par ailleurs, le dispositif comporte des moyens pour procéder au chargement simultané du numéro d'identifica¬ tion dans le récepteur et dans une pluralité d'émetteurs dont chacun constitue une clé d'accès à l'installation.In a preferred embodiment of the invention and in particular applied to anti-theft devices of a motor vehicle, the receiver is placed in a volume of the installation the access of which is controlled by one of the above-mentioned locking members and is connected to the transmitter through an optical fiber. The coded signal consists of an infrared rayonne¬ ment. Thus, it is necessary to approach the emitter of one free end of the optical fiber in order to make the infrared radiation penetrate there. This provision is an additional anti-fraud factor because, the signal emitted is not strong and does not radiate in a large space around the vehicle. Furthermore, the device includes means for simultaneously loading the identification number in the receiver and in a plurality of transmitters, each of which constitutes an access key to the installation.
Enfin, notamment dans le cas des véhicules automo- biles, il est avantageux de prévoir que les organes de condamnation soient normalement en position de service, la commande émise par le récepteur étant une commande de levée des condamnations, qui reste effective pendant un temps limité si aucune autre action de l'opérateur autorisé ne vient la relayer. Cette action est en général l'établissement du contact électrique général du véhicule. Or, pour des opérations d'entretien ou de réparation, l'utilisateur a besoin de confier son véhicule à un garagiste. Dans ces conditions, par un logiciel approprié simple mis en place dans le récepteur, une nouvelle commande de déverrouillage avant que le temps limité soit écoulé est interprétée par le récepteur comme une commande de déverrouillage général et illimité, c'est-à-dire qu'à réception de cette seconde commande, le récepteur inhibe les moyens de rappel des organes de verrouillage dans leur position active.Finally, in particular in the case of motor vehicles, it is advantageous to provide that the locking members are normally in the service position, the command issued by the receiver being a command to lift the convictions, which remains effective for a limited time. if no other action from the authorized operator takes over. This action is generally the establishment of the general electrical contact of the vehicle. However, for maintenance or repair operations, the user needs to entrust his vehicle to a garage. Under these conditions, by simple appropriate software installed in the receiver, a new unlocking command before the limited time has elapsed is interpreted by the receiver as a general and unlimited unlocking command, that is to say that on receipt of this second command, the receiver inhibits the means for restoring the locking members in their active position.
D'autres caractéristiques et avantages de l'inven¬ tion ressortiront de la description donnée ci-après à titre d'exemple, d'un mode de réalisation de l'invention.Other characteristics and advantages of the invention will emerge from the description given below by way of example, of an embodiment of the invention.
Il sera fait référence au dessin annexé qui est un schéma synoptique du récepteur et de l'émetteur selon 1 ' invention.Reference will be made to the accompanying drawing which is a block diagram of the receiver and the transmitter according to the invention.
Le dispositif de 1 ' invention comporte un émetteur 1 et un récepteur 2, l'émetteur fournissant au récepteur un signal codé 3 (par exemple sous forme d'un rayonnement émis par un diode infrarouge 4). Ce signal sera avantageusement collecté par une fibre optique 5 aboutissant à un amplifica¬ teur 6 du récepteur. La sortie de l'amplificateur est recueillie par un contrôleur 7 qui réalise l'analyse du signal et son décodage et qui émet en sortie 8 des signaux de commande en direction des organes de condamnation à actionner (non représentés), par l'intermédiaire de circuits d' interfa- çage 9 et de mixage 10. Le contrôleur 7 reçoit en entrée 11 des signaux de retour le renseignant sur l'état des organes de condamnation qu'il a actionnés. On notera que le contrô- leur 7 possède une sortie 12 d'excitation d'une ou plusieurs diodes luminescentes 13 et 14 de couleurs différentes, formant témoins de fonctionnement (ou d'état) des divers organes de condamnation ou d'autres composants du dispositif tel, par exemple, que la source d'énergie. Cette dernière comporte au moins une batterie 15 qui, dans le cas d'un dispositif anti-vol de véhicule automobile, peut être la batterie d'accumulateurs du véhicule lui-même, doublée d'une petite batterie de secours 16.The device of the invention comprises a transmitter 1 and a receiver 2, the transmitter supplying the receiver with a coded signal 3 (for example in the form of radiation emitted by an infrared diode 4). This signal will advantageously be collected by an optical fiber 5 leading to an amplifier 6 of the receiver. The output of the amplifier is collected by a controller 7 which analyzes the signal and its decoding and which emits at output 8 control signals in the direction of the locking members to be actuated (not shown), by means of interface 9 and mixing circuits 10. The controller 7 receives input signals at input 11 informing it of the state of the locking members that it has actuated. It will be noted that the controller 7 has an excitation output 12 for one or more light-emitting diodes 13 and 14 of different colors, forming indicators of operation (or state) of the various locking devices or other components of the device such as, for example, the energy source. The latter comprises at least one battery 15 which, in the case of an anti-theft device of a motor vehicle, may be the storage battery of the vehicle itself, coupled with a small backup battery 16.
Pour ce qui concerne l'émetteur 1, celui-ci comprend un codeur 17, une unité de traitement 18 et de commande de l'émission (l'interrupteur 18a_ symbolisant l'action manuelle), un circuit 19 d'interface entre l'unité 18 et la diode 4 et un circuit 20 d'interface pour permettre le chargement du codeur comme cela sera expliqué ci-après. Le contrôleur logique 7 du récepteur consiste en un microprocesseur comprenant deux programmes, l'un de défini¬ tion d'un nombre clé (c) et l'autre définissant un nombre (n) donné de chiffres, à partir d'une pluralité de (p) chiffres aléatoires chargés dans une mémoire électriquement programma- ble et effaçable 21. Par exemple, la pluralité (p) de chiffres chargée dans la mémoire 21 comprend 4 chiffres quelconques déterminés par un générateur de chiffres aléatoi¬ res que comprend le microprocesseur ou qui est connecté à ce dernier pour charger la mémoire. Ces quatre chiffres consti- tuent le numéro d'identification du dispositif à partir desquels le microprocesseur peut calculer un nombre clé en fonction d'un programme ou d'un algorithme qu * il- contient. Cet algorithme sera par exemple : " l e nombre clé est la somme de ces quatre chiffres " . Ce nombre clé est mémorisé dans la mémoire 21.As regards the transmitter 1, this comprises an encoder 17, a processing unit 18 and emission control (the switch 18a_ symbolizing manual action), an interface circuit 19 between the unit 18 and the diode 4 and an interface circuit 20 to allow the encoder to be loaded as will be explained below -after. The logic controller 7 of the receiver consists of a microprocessor comprising two programs, one defining a key number (c) and the other defining a given number (n) of digits, from a plurality of (p) random digits loaded in an electrically programmable and erasable memory 21. For example, the plurality (p) of digits loaded in the memory 21 comprises any 4 digits determined by a random digit generator that the microprocessor includes or which is connected to it to load the memory. These four digits constitute the identification number of the device from which the microprocessor can calculate a key number as a function of a program or algorithm that it contains. This algorithm will be for example: "the key number is the sum of these four digits". This key number is stored in memory 21.
Au moyen d'un second programme ou algorithme, le microprocesseur définit un nombre déterminé n de chiffres. Ce nombre sera de préférence au moins égal à quatre. Un algo¬ rithme simple consiste à décider que chacun de ces quatre chiffres est égal au quatre chiffres composant le numéro d'identification. Ces quatre chiffres sont également mémori¬ sés dans la mémoire 21.By means of a second program or algorithm, the microprocessor defines a determined number n of digits. This number will preferably be at least equal to four. A simple algorithm consists in deciding that each of these four digits is equal to the four digits composing the identification number. These four digits are also memorized in memory 21.
Par le biais d'une connexion amovible 22, le microprocesseur 7 charge d'une part le nombre clé (c) et, d'autre part, les (n) chiffres calculés par le second algorithme, dans une mémoire électriquement programmable et effaçable appartenant à l'ensemble codeur 17/unité de traitement 17. Le codeur comprend également un générateur de chiffres aléatoires capable d'engendrer en direction de l'unité de traitement 18 une séquence de (t) chiffres quelconques (par exemple 16 chiffres) à chaque commande manuelle de l'émetteur (fermeture de l'interrupteur 18a).By means of a removable connection 22, the microprocessor 7 loads on the one hand the key number (c) and, on the other hand, the (n) digits calculated by the second algorithm, in an electrically programmable and erasable memory belonging to the encoder 17 / processing unit 17 assembly. The encoder also comprises a generator of random digits capable of generating in the direction of the processing unit 18 a sequence of (t) digits any (for example 16 digits) on each manual command of the transmitter (closing of the switch 18a).
L'unité de traitement comprend un algorithme par lequel on établit une relation entre les chiffres de la séquence (t) qui sont, dans cette séquence, à la position définie par les (n) chiffres mémorisés, à l'exception d'au moins un, et le nombre clé (c). Le résultat de cette relation appelé nombre code (r) est alors inscrit à l'emplacement du chiffre qui n'a pas été pris en compte dans la relation. La séquence de (t) chiffres aléatoires devient une séquence pseudo aléatoire qui est transformée par le circuit d'inter¬ face 19 en un signal d'excitation codé de la diode 4 émet- trice d'un rayonnement infrarouge.The processing unit comprises an algorithm by which a relation is established between the digits of the sequence (t) which are, in this sequence, at the position defined by the (n) stored digits, with the exception of at least one, and the key number (c). The result of this relationship called number code (r) is then written to the location of the digit that was not taken into account in the relationship. The sequence of (t) random digits becomes a pseudo-random sequence which is transformed by the interface circuit 19 into a coded excitation signal from the diode 4 emitting infrared radiation.
Conduit par la fibre optique 5, ce rayonnement est transformé par le circuit 6 en signal électrique codé où il est analysé par l'unité logique ou microprocesseur 7 qui contient un algorithme semblable a celui de 1 ' élaboration du signal dans l'émetteur, c'est-à-dire permettant d'isoler dans la série pseudo-aléatoire reçue les n chiffres significatifs définis par leur position dans la série et de constater (ou non) qu'ils vérifient la relation qui les combine avec le nombre clé.Led by optical fiber 5, this radiation is transformed by circuit 6 into a coded electrical signal where it is analyzed by logic unit or microprocessor 7 which contains an algorithm similar to that of the processing of the signal in the transmitter, c that is to say allowing to isolate in the pseudo-random series received the n significant digits defined by their position in the series and to note (or not) that they verify the relation which combines them with the key number.
Si cette vérification est constatée, l'unité 7 envoie un ordre de commande par ses sorties 8 en direction des organes de condamnation à actionner dans le sens de leur libération. Dans le cas contraire, ces organes ne sont pas actionnés et restent dans leur position de condamnation.If this verification is observed, the unit 7 sends a control order via its outputs 8 in the direction of the locking members to be actuated in the direction of their release. Otherwise, these organs are not actuated and remain in their locked position.
Pour illustrer cet exposé, on supposera que le numéro d'identification est 2 3 4 5, que le nombre clé (c) est 2 + 3 + 4 + 5 = 14 et que les n chiffres déterminés par le second programme ou algorithme, sont 2, 3, 4, et 5.To illustrate this presentation, we will assume that the identification number is 2 3 4 5, that the key number (c) is 2 + 3 + 4 + 5 = 14 and that the n digits determined by the second program or algorithm, are 2, 3, 4, and 5.
Ainsi, en ayant chargé le récepteur et l'émetteur, ceux-ci ont en mémoire le nombre clé (c) 14 et les quatre chiffres 2, 3, 4, 5. Le générateur aléatoire de l'émetteur est activé 18a. par l'utilisateur. Les 16 chiffres générés sont par exemple : 1 2 3 6 2 8 7 9 5 2 6 3 7 8 4 1.Thus, having loaded the receiver and the transmitter, these have in memory the key number (c) 14 and the four digits 2, 3, 4, 5. The random generator of the transmitter is activated 18a . by the user. The 16 digits generated are for example: 1 2 3 6 2 8 7 9 5 2 6 3 7 8 4 1.
Le second algorithme ayant défini les chiffres 2, 3, 4 et 5, a défini : a) que quatre chiffres de la séquence aléatoire sont significatifs : b) que ces quatre chiffres sont placés, le premier en seconde position dans la séquence (soit n1 = 2) , le second dans la troisième position qui suit le premier (soit n2 = 2), le troisième dans la quatrième position après le second (soit __3 = 5) et le dernier dans la cinquième position après le quatrième (soit n = 8).The second algorithm having defined the digits 2, 3, 4 and 5, defined: a) that four digits of the random sequence are significant: b) that these four digits are placed, the first in second position in the sequence (i.e. n 1 = 2), the second in the third position following the first (i.e. n 2 = 2), the third in the fourth position after the second (i.e. __ 3 = 5) and the last in the fifth position after the fourth ( let n = 8).
L'algorithme de traitement de l'émetteur est de la forme : n- x n2 x n3 +_ (r) = (c) ; c'est-à-dire si n1 x n2 x n3 > (c), la relation est n-, x n2 x n3 - (r) = (c) ; si n- x n2 x n3 < (c), la relation est : n1 x n2 x n3 + (r) = (c) . Dans le cas présent, 2 x 2 x 5 - (r) = 14, d'où (r) = 6. La séquence pseudo aléatoire transmise est alors 1The processing algorithm of the transmitter is of the form: n- xn 2 xn 3 + _ (r) = (c); that is, if n 1 xn 2 xn 3 > (c), the relation is n-, xn 2 xn 3 - (r) = (c); if n- xn 2 xn 3 <(c), the relation is: n 1 xn 2 xn 3 + (r) = (c). In the present case, 2 x 2 x 5 - (r) = 14, hence (r) = 6. The transmitted pseudo-random sequence is then 1
2 3 6 2 8 7 9 5 2 6 3 7 6. 4 1.2 3 6 2 8 7 9 5 2 6 3 7 6. 4 1.
Le récepteur recevant ce signal va isoler les chiffres 2, 2, 5 et 6 et, constatant que 2 x 2 x 5 = 20 > 14, faire l'opération 2 2 x 5 - 6 pour constater que le résultat est égal au nombre clé, et en conséquence agir sur la commande des organes de condamnation.The receiver receiving this signal will isolate the digits 2, 2, 5 and 6 and, noting that 2 x 2 x 5 = 20> 14, do the operation 2 2 x 5 - 6 to find that the result is equal to the key number , and consequently act on the command of the condemnation organs.
Ce codage présente l'avantage de ne pas être décryptable aisément, car même si on en connaît le principe, le numéro d'identification est attribué au dispositif d'une manière aveugle.This coding has the advantage of not being easily decryptable, because even if the principle is known, the identification number is assigned to the device in a blind manner.
Il existe des enregistreurs qui peuvent capter un rayonnement infrarouge codé, à l'insu de l'opérateur. A partir de cet enregistrement, il est donc aisé de reproduire un code qui "fonctionne". Avec le dispositif selon 1 ' inven- tion cette fraude ne peut se pratiquer que si on confie un émetteur à une personne indélicate qui recopie le signal.There are recorders that can capture coded infrared radiation without the operator's knowledge. From this registration, it is therefore easy to reproduce a code that "works". With the device according to the invention, this fraud can only be practiced if one entrusts a transmitter to an indelicate person who copies the signal.
Le dispositif selon l'invention offre deux parades simples à cette fraude. La première consiste au moyen d' .ne unité de mémoire prévue dans le récepteur 7, à enregistrer chacun des signaux reçus ou au moins un grand nombre de c .ux dernièrement reçus (par exemple les cinq cents derniers), et à comparer chaque nouveau signal à cette collection de signaux anciens. S'il y a identité de signaux, l'action de l'unité logique 7 sur les organes de condamnation est inhibée; il se peut que cette inhibition se produise malgré un signal "autorisé" ; dans ce cas l'opérateur renouvelle l'émission et selon toute probabilité, le nouveau code sera différent de tous ceux enregistrés. En revanche, la répéti¬ tion frauduleuse du signal identique à lui-même ne produira pas la décondamnation souhaitée. On peut d'ailleurs agrémen¬ ter le dispositif d'une alarme qui serait activée quand le dispositif a à connaître trois ou quatre signaux consécutifs semblables. On peut également prévoir un accès 23 de lecture de la mémoire d'enregistrement des 4 ou 500 derniers codes reçus qui permettrait en l'absence d'alarme, de pouvoir détecter les tentatives de fraudes .The device according to the invention offers two simple solutions to this fraud. The first is by means of .ne memory unit provided in the receiver 7, to SAVE r er each of the received signals or at least a large number of c .ow recently received (e.g. the last five cents), and comparing each new signal to this collection of old signals. If there is identity of signals, the action of logic unit 7 on the locking devices is inhibited; this inhibition may occur despite an "authorized"signal; in this case the operator renews the transmission and in all probability, the new code will be different from all those recorded. On the other hand, the fraudulent repetition of the signal identical to itself will not produce the desired unlocking. It is also possible to add the device to an alarm which would be activated when the device has to know three or four similar consecutive signals. It is also possible to provide an access 23 for reading the memory for recording the 4 or 500 last codes received which would make it possible, in the absence of an alarm, to be able to detect fraud attempts.
La seconde parade réside dans une réinitialisation du dispositif récepteur et émetteurs en chargeant l'un et les autres d'un nouveau numéro d'identification formé de chiffres aléatoires.The second parry resides in a reset of the receiving and transmitting device by loading one and the other with a new identification number formed of random digits.
Dans une variante plus élaborée de l'invention, avant l'action sur organes de condamnation, la reconnaissance du signal émis peut conduire à l'émission par le récepteur, au moyen d'un émetteur secondaire 7a. d'un rayonnement codé, formant signal code de retour et comportant une série aléatoire de chiffres qui est reçue via la fibre optique 5 par un récepteur secondaire 25 relié à l'unité de traitement 18 de l'émetteur.In a more elaborate variant of the invention, before the action on locking devices, recognition of the transmitted signal can lead to transmission by the receiver, by means of a secondary transmitter 7a . of coded radiation, forming a return code signal and comprising a random series of digits which is received via the optical fiber 5 by a secondary receiver 25 connected to the processing unit 18 of the transmitter.
Au moyen d'un algorithme particulier ou semblable à celui décrit précédemment la série de chiffres reçue par l'émetteur 1 est combinée avec la série précédemment émise pour être transformée en un nouveau signal codé (image d'une série de chiffres) que le récepteur 2 est capable de recon¬ naître comme étant le signal validant l'autorisation de décondamnation. Cet échange bidirectionnel de signaux permet d'éviter la fraude provenant de la simple émission d'une copie d'un signal valide tout en pouvant se dispenser de l'enregistrement des nombreux signaux précédents. En réponse à cette validation, le récepteur 2 émet en direction de l'émetteur 1 un nombre (par exemple le nombre d'ordre correspondant au nombre de décondamnations déjà réalisées), ce nombre étant alors inscrit dans une mémoire 20 de l'émet¬ teur.By means of a particular algorithm or similar to that described above the series of numbers received by the transmitter 1 is combined with the series previously transmitted to be transformed into a new coded signal (image of a series of digits) that the receiver 2 is capable of recognizing as being the signal validating the authorization for unlocking. This bidirectional exchange of signals makes it possible to avoid fraud resulting from the simple emission of a copy of a valid signal while being able to dispense with the recording of the numerous previous signals. In response to this validation, the receiver 2 transmits a number towards the transmitter 1 (for example the order number corresponding to the number of unlocking operations already carried out), this number then being written to a memory 20 of the transmitter. tor.
Lors du verrouillage suivant, l'émetteur, à 1 ' actionnement de l'interrupteur 18a., transmettra ce nombre au récepteur, via la fibre optique 5 qui le comparera à la valeur qu'il aura conservé en mémoire. Cette comparaison constitue un premier degré de sécurité au sens où si elle n'est pas probante, la poursuite de la séquence est inhibée, et la procédure de décondamnation est bloquée. Cela permet de lutter contre la fraude consistant à implanter dans un émetteur non dédié les données copiées d'un émetteur authen¬ tique. En effet, l'émetteur frauduleux étant, par hypothèse, utilisé après que l'émetteur authentique a été utilisé plusieurs fois, le nombre d'ordre susdit aura changé.During the next locking, the transmitter, upon actuation of the switch 18a . , will transmit this number to the receiver, via the optical fiber 5 which will compare it with the value which it will have kept in memory. This comparison constitutes a first degree of security in the sense that if it is not convincing, the continuation of the sequence is inhibited, and the unlocking procedure is blocked. This makes it possible to combat fraud consisting in implanting in a non-dedicated transmitter the data copied from an authentic transmitter. Indeed, the fraudulent issuer being, by hypothesis, used after the authentic issuer has been used several times, the above-mentioned order number will have changed.
Dans le cas où plusieurs émetteurs sont prévus pour un même récepteur, il faut que le signal initial transmis de l'émetteur au récepteur, au début de chaque échange comporte un élément identifiant l'émetteur en cause pour que le récepteur lui affecte, lors du traitement du signal, le numéro d'ordre qui lui revient et qui est stocké à part du numéro d'ordre affecté à chacun des autres émetteurs.If several transmitters are provided for the same receiver, the initial signal transmitted from the transmitter to the receiver must, at the start of each exchange, include an element identifying the transmitter in question so that the receiver assigns it, during the signal processing, the serial number which belongs to it and which is stored apart from the serial number assigned to each of the other transmitters.
Bien entendu, l'émetteur de l'invention est mobile, c'est-à-dire porté par l'opérateur. Pour agir sur le disposi- tif, l'émetteur doit être approché de l'extrémité 5a de la fibre optique 5. Contrairement aux émetteurs infrarouge de commande à distance, le fait d'être à proximité de la fibre ne demande qu'une très faible puissance émettrice donc une consommation faible d'énergie embarquée dans l'émetteur. L'extrémité 5a de la fibre peut être très discrète et constituer déjà pour le fraudeur une occasion de perdre du temps .Of course, the transmitter of the invention is mobile, that is to say carried by the operator. To act on the device, the transmitter must be approached at the end 5a of the optical fiber 5. Unlike infrared remote control transmitters, being close to the fiber requires only a very low transmitting power and therefore low energy consumption on board the transmitter. The end 5a of the fiber can be very discreet and already constitute an opportunity for the fraudster to waste time.
Elle peut, en revanche, constituer le témoin lumineux, hors de l'installation, de l'état des organes de verrouillage. Pour ce faire, elle peut être bidirectionnelle et par un miroir 24 transparent aux infrarouge, recueillir à l'intérieur du récepteur 2, l'émission lumineuse d'une ou plusieurs diodes commandée par l'unité logique 7 qui possède les information sur l'état de ces organes. L'invention trouve bien entendu de nombreuses applications dans le domaine de la sécurité des biens ou des personnes.On the other hand, it can constitute the indicator light, outside the installation, of the state of the locking members. To do this, it can be bidirectional and by a mirror 24 transparent to infrared, collect inside the receiver 2, the light emission of one or more diodes controlled by the logic unit 7 which has the information on the state of these organs. The invention naturally finds numerous applications in the field of the security of goods or people.
L'une d'elles réside dans son utilisation comme anti-vol de véhicule automobile. Dans ce cas, le récepteur 2 est logé dans l'espace moteur de la carrosserie et la fibre optique aboutit à la planche de bord en empruntant sans difficulté l'un des passages des câbles prévus entre l'habi¬ tacle et l'espace moteur. Parmi les organes de condamnation on comptera un coupe-circuit électrique général et un verrouillage de la fermeture du capot moteur de manière à interdire l'accès au moteur du véhicule et au récepteur du dispositif. L'énergie nécessaire au récepteur sera celle fournie par la batterie du véhicule avec une batterie de secours, en cas de défaillance de la batterie principale. Il faut noter qu'il sera mis en place des systèmes de sécurité décondamnant les accès au moteur en cas de panne.One of them lies in its use as an anti-theft motor vehicle. In this case, the receiver 2 is housed in the engine space of the bodywork and the optical fiber ends up at the dashboard by borrowing without difficulty one of the cable passages provided between the tackle and the engine space. . Among the locking devices there will be a general electric circuit breaker and a locking of the closing of the engine cover so as to prevent access to the vehicle engine and to the receiver of the device. The energy required for the receiver will be that supplied by the vehicle battery with a backup battery, in the event of failure of the main battery. It should be noted that security systems will be implemented to unlock the access to the engine in the event of a breakdown.
En effet, 1 'actionnement des organes de verrouil¬ lage par le récepteur 2 peut être temporaire et cesser après un temps déterminé si cet "ordre" de déverrouillage n'est pas relayé par une instruction permanente provenant par exemple de la fermeture de l'interrupteur (contact) électrique général du véhicule. Dans ce cas le signal lumineux présent à 1 ' extrémité de la fibre optique 5a pourrait être vert clignotant. Or, il doit être permis d'accéder aux organes du véhicule en cas de panne ou d'entretien, contact coupé. C'est • pourquoi pendant la temporisation et dans une autre variante de réalisation de l'invention, il est possible de commander l'inhibition totale des organes de verrouillage ou leur maintien sans limite de temps dans leur état ouvert. Pour obtenir ce résultat, il suffit par exemple d'actionner une seconde fois l'émetteur. La procédure de validation de ce signal est identique à celle décrite précédemment et conduit l'unité logique du récepteur à transmettre un signal de commande inhibant les moyens de condamnation, au même titre que l'action de mettre le contact dans le cas de l'application de l'invention à un véhicule automobile. Cette commande particulière, obtenue du récep¬ teur, résulte d'un programme particulier introduit dans le récepteur et susceptible d'être activé uniquement pendant le temps limité de décondamnation. La décondamnation permanente serait alors signalée par un signal lumineux vert continu présent à l'extrémité 5a_ de la fibre optique.In fact, the actuation of the locking devices by the receiver 2 can be temporary and stop after a determined time if this "order" of unlocking is not relayed by a permanent instruction originating for example the closing of the general electrical switch (contact) of the vehicle. In this case, the light signal present at the end of the optical fiber 5a could be flashing green. However, it must be allowed to access the vehicle components in the event of breakdown or maintenance, ignition off. • is why during the time delay and in another alternative embodiment of the invention, it is possible to control the total inhibition of the locking members or their continuation without time limit in their open state. To obtain this result, it is sufficient for example to actuate the transmitter a second time. The validation procedure for this signal is identical to that described above and leads the logical unit of the receiver to transmit a control signal inhibiting the locking means, in the same way as the action of switching on the ignition in the case of the application of the invention to a motor vehicle. This particular command, obtained from the receiver, results from a particular program introduced into the receiver and capable of being activated only during the limited unlocking time. The permanent unlocking would then be signaled by a continuous green light signal present at the end 5a_ of the optical fiber.
Pour faire cesser cet état, une nouvelle action sur l'émetteur conduit le récepteur à émettre un signal de suppression de l'inhibition des moyens de condamnation qui retrouveront leur état verrouillé après l'écoulement de la temporisation. Il est ainsi possible de laisser le véhicule déverrouillé chez un garagiste sans être contraint de lui laisser l'émetteur de commande. Cet émetteur peut avantageu- sèment être incorporé dans le porte-clé pour les clés d'ouverture et de contact du véhicule.To stop this state, a new action on the transmitter leads the receiver to send a signal to suppress the inhibition of the locking means which will return to their locked state after the expiration of the timer. It is thus possible to leave the vehicle unlocked at a garage without being forced to leave the transmitter. This transmitter can advantageously be incorporated in the key fob for the vehicle opening and contact keys.
Une seconde application de 1 ' invention est la réalisation d'une serrure électronique fiable pour locaux d'habitation ou professionnels. L'invention trouve une troisième application dans la gestion des accès réglementés à certaines zones dange* _u- ses ou sous haute protection. Il est en effet possible de créer des degrés d'accès avec une initialisation identiqu de tous les récepteurs dont les algorithmes sont différentes de sorte qu'à partir d'un numéro d'identification identique il est possible d'engendrer des codes dont la comple* té augmente en raison inverse de la permissivité d'accès, le code le plus complexe étant néanmoins opérant à 1 ' égard des accès "inférieurs". A second application of the invention is the production of a reliable electronic lock for residential or professional premises. The invention finds a third application in the management of regulated access to certain danger areas * _us or under high protection. It is indeed possible to create access degrees with an identic initialization of all the receivers whose algorithms are different so that from an identical identification number it is possible to generate codes including the complete * tee increases in inverse ratio to the permissiveness of access, the most complex code being nevertheless operative with regard to the "lower" accesses.

Claims

REVENDICATIONS
1. Dispositif d' ctionnement autorisé des organes de condamnation d'une installation à accès réglementé, comportant un émetteur (1) de signaux (3) codés et un récepteur (2) de ces signaux comprenant une unité logique (7) reliée aux organes de condamnation pour les commander en réponse au signal reçu, caractérisé en ce que l'unité logique (7) et l'émetteur (1) sont chargés d'un numéro d'identifica¬ tion formé d'une pluralité (p) de chiffres aléatoires, d'un premier programme de traitement élaborant un nombre clé (c) résultant d'une relation entre ces chiffres, et d'un second programme définissant un nombre (n) déterminé de chiffres, l'émetteur (1) ayant un codeur (17,19) comportant un généra¬ teur de séquences d'un nombre (t) préétabli de chiffres aléatoires et un programme de codage définissant un nombre code (r) résultant d'une relation entre ces chiffres, et avec un second programme définissant un nombre (n) déterminé de chiffres, l'émetteur (1) ayant un codeur (17,18) comportant un générateur de séquences d'un nombre (t) préétabli de chiffres aléatoires et un programme de codage définissant un nombre code (r) résultant d'une relation entre le nombre clé (c) et chacun des chiffres de la séquence (t) situé à chacune de positions relatives définies par les chiffres (n) élaborés par le second programme, à l'exception d'au moins un chiffre à la position duquel le nombre code (r) est placé, le signal émis étant l'image de la séquence pseudo-aléatoire ainsi créée, tandis que l'unité logique (7) possède un décodeur pour constater ou non, par un programme de décodage semblable au programme de codage, que la relation de codage est vérifiée, et actionne ou non en conséquence les organes de condamnation.1. Authorized actuation device for the locking organs of a regulated access installation, comprising a transmitter (1) of coded signals (3) and a receiver (2) of these signals comprising a logic unit (7) connected to the organs to order them in response to the received signal, characterized in that the logic unit (7) and the transmitter (1) are charged with an identification number formed by a plurality (p) of digits random, of a first processing program developing a key number (c) resulting from a relationship between these digits, and of a second program defining a determined number (n) of digits, the transmitter (1) having an encoder (17,19) comprising a sequence generator of a preset number (t) of random digits and a coding program defining a code number (r) resulting from a relationship between these digits, and with a second program defining a determined number (n) of digits, the transmitter (1) having an encoder (17,18) comprising a sequence generator of a preset number (t) of random digits and a coding program defining a code number (r) resulting from a relation between the key number (c ) and each of the digits of the sequence (t) located at each of the relative positions defined by the digits (n) produced by the second program, with the exception of at least one digit at the position of which the number codes (r) is placed, the signal emitted being the image of the pseudo-random sequence thus created, while the logic unit (7) has a decoder for noting or not, by a decoding program similar to the coding program, that the relation code is checked, and whether or not to operate the condemnation bodies accordingly.
2. Dispositif selon la revendication 1, caractérisé en ce que l'unité logique (7) est équipée d'un émetteur (7a_) pour transmettre avant action sur les organes de condamna- tion, un signal code à l'émetteur (1) quand la relation de codage est vérifiée, l'émetteur (1) à réception de ce signal code émettant une seconde séquence pseudo-aléatoire compor¬ tant un second nombre code situé à l'un des emplacements relatifs définis par les (n) chiffres et en relation avec le signal code, cette seconde séquence étant reçue et décodée par l'unité logique (7) qui agit en réponse sur les organes de condamnation.2. Device according to claim 1, characterized in that the logic unit (7) is equipped with a transmitter (7a_) for transmitting before action on the locking devices, a code signal to the transmitter (1) when the relationship of coding is verified, the transmitter (1) on receipt of this code signal transmitting a second pseudo-random sequence comprising a second code number located at one of the relative locations defined by the (n) digits and in relation to the signal code, this second sequence being received and decoded by the logic unit (7) which acts in response on the locking members.
3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que l'unité logique (7) comporte une mémoire d'enregistrement des derniers signaux reçus et un comparateur du signal traité avec chacun des signaux enregistrés, émettant en sortie un signal d'interdic¬ tion de commande des organes de condamnation, en cas d'éga¬ lité constatée par le comparateur. 3. Device according to claim 1 or claim 2, characterized in that the logic unit (7) comprises a memory for recording the last received signals and a comparator of the signal processed with each of the recorded signals, outputting a signal prohibition of control of the locking members, in the event of equality noted by the comparator.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le récepteur (2) est placé dans un volume de l'installation dont l'accès est commandé par l'un des organes de condamnation susdits et est relié à l'émetteur (1) par l'intermédiaire d'une fibre optique (5). 4. Device according to one of claims 1 to 3, characterized in that the receiver (2) is placed in a volume of the installation whose access is controlled by one of the above-mentioned locking members and is connected to the transmitter (1) via an optical fiber (5).
5. Dispositif selon la revendication 4, caractérisé en ce que le signal codé est constitué par un rayonnement infrarouge.5. Device according to claim 4, characterized in that the coded signal consists of infrared radiation.
6. Dispositif selon l'une quelconque des revendica¬ tions précédentes, caractérisé en ce qu'il comporte des moyens pour procéder au chargement du numéro d'identification dans le récepteur (2) qui comportent une connexion amovible avec une pluralité d'émetteurs (1) dont chacun constitue une clé d'accès à l'installation pour charger chacun d'eux du nombre clé et des (n) chiffres aléatoires. 6. Device according to any one of the preceding claims, characterized in that it comprises means for loading the identification number into the receiver (2) which comprise a removable connection with a plurality of transmitters ( 1) each of which constitutes an access key to the installation in order to load each of them with the key number and (n) random digits.
7. Dispositif selon la revendication 6, caractérisé en ce que ces moyens sont constitués par un générateur séparé d'une série de (p) chiffres aléatoires.7. Device according to claim 6, characterized in that these means consist of a generator separate from a series of (p) random numbers.
8. Dispositif selon l'une quelconque des revendica¬ tions précédentes caractérisé en ce que l'installation étant constituée par un véhicule automobile, le volume accueillant le récepteur (2) est formé par le volume moteur et le capot est équipé d'un organe de verrouillage dont l'ouverture est commandée par l'unité logique (7) du récepteur (2).8. Device according to any one of the preceding revendica¬ tions characterized in that the installation being constituted by a motor vehicle, the accommodating volume the receiver (2) is formed by the engine volume and the cover is equipped with a locking member, the opening of which is controlled by the logic unit (7) of the receiver (2).
9. Dispositif selon la revendication 8, caractérisé en ce que l'émetteur (1) est intégré au porte-clé du véhicule et coopère, depuis l'habitacle, avec l'extrémité (5a.) d'une fibre optique (5) traversant la paroi du véhicule séparant l'habitacle du moteur. 9. Device according to claim 8, characterized in that the transmitter (1) is integrated into the keychain of the vehicle and cooperates, from the passenger compartment, with the end (5a.) Of an optical fiber (5) crossing the wall of the vehicle separating the passenger compartment from the engine.
EP19920908882 1991-03-26 1992-03-26 Device for authorized actuation of locking means Withdrawn EP0531502A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103635 1991-03-26
FR9103635A FR2674656B1 (en) 1991-03-26 1991-03-26 AUTHORIZED ACTUATION DEVICE FOR SENTENCES OF AN INSTALLATION.

Publications (1)

Publication Number Publication Date
EP0531502A1 true EP0531502A1 (en) 1993-03-17

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EP (1) EP0531502A1 (en)
FR (1) FR2674656B1 (en)
WO (1) WO1992017863A1 (en)

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GB2274529A (en) * 1993-01-22 1994-07-27 Brendan David Townsend Closed-circuit vehicle immobiliser system
WO1994018036A1 (en) * 1993-02-12 1994-08-18 Robert Bosch Gmbh Remote-controlled protection system for a motor vehicle
DE4416705C1 (en) * 1994-05-11 1995-04-27 Siemens Ag Electronic security device and method for operating it
US5774858A (en) * 1995-10-23 1998-06-30 Taubkin; Vladimir L. Speech analysis method of protecting a vehicle from unauthorized accessing and controlling

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SE423736B (en) * 1981-07-01 1982-05-24 Securitas Int Ab PLANT TO MAKE A MANOVER SIGNAL
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US4665397A (en) * 1983-11-01 1987-05-12 Universal Photonics, Inc. Apparatus and method for a universal electronic locking system
DE3840857A1 (en) * 1988-12-03 1990-06-07 Hella Kg Hueck & Co Device for the remote control of security devices

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FR2674656A1 (en) 1992-10-02
FR2674656B1 (en) 1993-05-28
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