EP1378865A1 - Procédé de contrôle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé - Google Patents
Procédé de contrôle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé Download PDFInfo
- Publication number
- EP1378865A1 EP1378865A1 EP03013017A EP03013017A EP1378865A1 EP 1378865 A1 EP1378865 A1 EP 1378865A1 EP 03013017 A EP03013017 A EP 03013017A EP 03013017 A EP03013017 A EP 03013017A EP 1378865 A1 EP1378865 A1 EP 1378865A1
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- European Patent Office
- Prior art keywords
- signal
- vehicle
- amplitude
- coded
- signature
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- 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
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- 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
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
- G07C2009/00555—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks comprising means to detect or avoid relay attacks
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- 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
- G07C2009/00793—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 Hertzian waves
Definitions
- the invention relates to a method for controlling access to a portable object customized to a specific space, such as a vehicle, by wireless transmission of a coded identification signal.
- electronic means are provided for in space. These electronic means include, in particular, management means accesses connected to reception means and / or signal transmission means.
- the portable object for access control comprises a processing unit connected to transmission means and / or signal receiving means.
- the process of access control to space consists first of all to transmit a coded signal identification by the transmission means of the portable object or respectively by the transmission means provided in the determined space.
- This coded signal is then received by the receiving means in space or respectively by means of receiving the portable object, when the object is in a restricted area around reception means and / or transmission means provided in the space.
- a verification of the received coded signal is performed in the access management means or in the processing unit to allow access to the space.
- the invention also relates to a personalized portable object for access to the determined space.
- This portable object comprises in particular a processing unit connected signals and transmission means and / or reception means of signals to transmit or receive a coded identification signal for access to the determined space.
- the encoded signal transmission can be started automatically as soon as the presence the object in a restricted area around the transmitting means and / or the means received in the space has been detected.
- This transmission of the coded signal can also be started manually by activating control means of the object or space.
- This transmission of the coded signal can therefore be realized from the object the means of reception provided in the space or vice versa means emission in space to the object.
- the received coded signal has been recognized in the access management means of the space or in the processing unit of the object, it is then possible to access the space.
- the determined space can be a security enclosure, a safe, a secure room or building with an access door controlled by the portable object, a vehicle, or any other space in which entry is permitted only to persons authorized. Access authorization allows for example to open or close a door the enclosure, the safe or a secure building.
- the space is defined by a road vehicle, such as a passenger car, including the doors and the safe can be locked or unlocked by remote control using a custom portable object.
- the personalized portable object can be an electronic key, a watch, a cell phone, smart card, badge or other portable device.
- this portable object is an electronic key for controlling access to a vehicle.
- This portable object may include an own source of energy for the power supply of its electronic components.
- the portable object is active type.
- the power supply of said electronic components can also from a signal with a determined carrier frequency that is transmitted by transmission means provided in the space and which is received in the portable object.
- the portable object is of the passive type.
- the portable object is of the passive type.
- the electronic key includes in particular a microcontroller connected to storage means in which an encryption algorithm is stored and / or a vehicle access code. As soon as a button is pressed of the key is operated, the microcontroller calculates a coded identification signal to transmitting by means of transmitting signals towards the vehicle. After recognition of the coded signal received by the vehicle, a lock command or unlocking parts or functions of the vehicle is performed.
- an electronic key whose response signal is transmitted automatically to the vehicle based on an interrogation signal received from the vehicle.
- the key must be in a restricted area around the vehicle for receive this interrogation signal from the vehicle.
- the key transmits a signal to the vehicle only if the interrogation signal has been recognized by the key. This response signal thus makes it possible to control the locking or unlocking of parts or functions of the vehicle.
- FIG. 1 schematically represents the principle of relay attack intermediate.
- the two relays are placed respectively close to an object portable, such as an electronic key with automatic control, and the vehicle associated.
- the carrier of the portable object 2 In a normal situation without the relays, the carrier of the portable object 2 must to be in a restricted area around the vehicle 1 to order the opening of the closed vehicle, because the interrogation signal 6, 8 transmitted by a antenna 11 means of transmitting signals 14 of the vehicle, can not be detected only at short distance.
- This interrogation signal has a low carrier frequency frequency LF, for example of the order of 125 kHz.
- a sequence of binary data in the interrogation signal is for example generated by amplitude modulation of the carrier.
- An antenna 21 for receiving means of the object 2 can not detect this low-frequency interrogation signal only in an area around the vehicle that does not exceed, for example, not 2 m.
- an antenna 22 means for transmitting the object portable transmits a response signal 9, 10.
- This signal response has a frequency high frequency carrier UHF, for example of the order of 433 MHz.
- This signal response is picked up by an antenna 12 of receiving means 15 of the vehicle. of the access management means 13 connected to the transmission means and the means of receipt of the vehicle will order including the opening of doors and trunk the vehicle upon receipt of the response signal.
- FIG. 2 represents a flowchart of the steps of the control method access to a portable object, such as an electronic key, personalized to the vehicle of way to control the locking or unlocking including doors and of the trunk of said vehicle.
- a portable object such as an electronic key
- step 50 the electronic key in the possession of the user of the vehicle is in the waiting position.
- an interrogation signal LF is transmitted by the means transmission in step 52 under the control of the access management means of the vehicle.
- step 53 the key, placed in the restricted area around the vehicle, receives the interrogation signal and verifies the identity of the vehicle by this received signal. If this signal coded query is not recognized by the key, the key is placed again in the waiting position in step 50.
- a response signal is calculated by a processing unit of the key to step 54. This high frequency response signal is transmitted by the antenna means key issue in step 55.
- the means for receiving the vehicle captures this response signal to enable the access management means of order the opening or closing of the vehicle at step 56.
- the first intermediate relay 3, placed in the restricted zone 5 around the vehicle, is able to receive by an antenna 31 an interrogation signal 6 to low frequency.
- This first relay converts the low frequency signal LF to transmit an RF radio signal 7 by an antenna 32 to a second relay 4 near the carrier of the portable object 2.
- This second relay converts the RF radiofrequency signal received by the antenna 42 in a low frequency signal LF, which is the image of the interrogation signal transmitted by the vehicle.
- This low signal frequency 8 is transmitted by the antenna 41 to the portable object 2.
- This object portable receives by the antenna 21 the interrogation signal 8 provided by the second relay 4. After receiving the interrogation signal, a high frequency response signal UHF 9 is transmitted by the antenna 22, if the identity of the vehicle has been recognized.
- the second relay picked up by the antenna 43 this high frequency signal.
- the second relay converts the signal high frequency received by the portable object into a radiofrequency signal that is transmitted by the antenna 42.
- the first relay receives the high frequency signal and converts it to a UHF high frequency signal, which is the image of the response signal calculated by the object portable.
- This high frequency response signal 10 is transmitted by the antenna 33 to destination of the vehicle so that the antenna 12 of the receiving means 15 receives the response signal 10.
- Access management means 13 connected to the transmission means and the means of reception of the vehicle will control in particular the opening of the doors and trunk of the vehicle as soon as the response signal is received.
- FIG. 3 represents a flowchart of the steps of the control method access of a portable object, such as an electronic key, to the vehicle through intermediary relays for locking or unlocking, particularly doors and of the trunk of said vehicle. It should be noted that the steps in this Figure 3, which corresponding to that of Figure 2, bear identical reference signs.
- the interrogation signal is transmitted by the vehicle in step 52.
- This interrogation signal is therefore picked up by the first relay in step 60 to convert it to a radio frequency signal.
- This conversion into a signal Radio frequency is necessary for long distance transmission.
- the second relay captures the radio frequency signal from the first relay in step 61 in order to convert it into a signal that is the image of the interrogation signal. This signal interrogation is transmitted to the electronic key.
- step 53 the key near the second relay receives the interrogation signal and verify the identity of the vehicle by this received signal. If this coded interrogation signal is not recognized by the key, the key is placed in the waiting position again In contrast, if this interrogation signal is recognized by the key, then a response signal is calculated by a key processing unit in step 54. This signal high frequency response is transmitted by the antenna means of issuing the key in step 55.
- step 62 the second relay captures this response signal to convert it again in a radiofrequency signal. This radiofrequency signal is transmitted from the second relay to the first relay.
- the first relay having received the radiofrequency signal, converts it into a high frequency signal which is the image response signal transmitted by the key. This high frequency signal is transmitted to the vehicle so that in step 56, the access management means control the opening or closing the vehicle.
- WO 01/25060 A solution to avoid the use of such intermediary relays is mentioned in WO 01/25060.
- This document describes a detection system that prevents an intermediate relay attack for unlocking a vehicle to unbeknownst to the user of said vehicle.
- a frequency comparison of signals transmitted and received by the car is operated in the car so as to estimate the remote response time of the key.
- the frequency of the signal received by the key is used to define the operations processed in the key and the frequency of the signal answer of the key.
- the frequency of the response signal is for example more than 1000 times greater than the frequency of the received signal.
- the frequency is varied in the car until the moment the signal response from the key is received.
- the frequency of the response signal is divided to correspond to the frequency of the signal initially transmitted. So, a comparison between the frequency of the response signal and the frequency changed over time in the car is operated. The greater the distance between the key and the car, the more frequency of signals in the car will have changed. We can detect by this measurement of frequency change, if intermediate relays have been used to the unexpected opening of the car.
- a disadvantage of the solution proposed in this document is in particular the complexity of creating this frequency variation in the car in order to be able to accurately estimate the distance between the key and the car. It is necessary that give a distance value from which the electronic means estimate Intermediate relays could be used to unlock the car.
- the object of the invention is therefore to provide an access control method of a custom portable object to a specific space preventing the use of relays intermediate and overcoming the disadvantages of the cited prior art.
- the encoded identification signal transmitted and received comprises a analog signature defined by at least one amplitude variation of the envelope of the encoded signal, said analog signature being specific to either the portable object or the electronic means provided in the space, that is to say the pair formed by the object custom notebook and electronic means provided in the space so as to allow access to the space in case of recognition of the said signature.
- An advantage of the method is that with the use of an analog signature in the coded signal, this prevents any intermediate relays held by ill-intentioned people to serve as a bridge between the object and the means provided in the space to be accessed.
- These possible relays are not as to reproduce digital type signals, that is, in which a sequence of binary data is transmitted.
- the analog signature which depends characteristics of the transmitting means and / or receiving means, may be at least one amplitude variation of the coded signal envelope. It could be over-modulation of the envelope of the coded signal.
- This analog signature can also be defined according to a growth time and / or a time of amplitude decrease of the coded signal envelope at the beginning or at the end of the signal code. If the coded signal comprises a sequence of binary data, this signature can be defined according to a time of growth and / or decay of amplitude between two bits of different value of the sequence of data. The amplitude variation during the growth time and / or decay being linear or hyperbolic or random.
- the determined space is a vehicle and the portable object is a personalized electronic key to the vehicle to order.
- Components key electronics are powered by power supply means that include a standard battery or accumulator or photovoltaic cells or an oscillating mass generator.
- the analog signature is preferably inserted in the coded signal interrogation transmitted by the vehicle to the electronic key.
- This signal interrogation comprises a data sequence obtained by modulation amplitude of the determined carrier frequency signal.
- This carrier frequency can be of the order of 125 kHz.
- Each bit of the sequence is set to a time period greater than the reverse of the carrier frequency.
- the interrogation signal transmitted by the vehicle is low Frequency
- most of the computing operations in the microcontroller of the key is also low frequency which reduces the consumption compared to a high frequency treatment.
- the operation is also low frequency.
- a high frequency response signal shall be transmitted to the vehicle for controlling the locking or unlocking of parts or functions of the vehicle.
- This high carrier frequency can be of the order of 433 MHz, which makes it possible to order the vehicle at a distance between 10 to 30 m.
- the power consumption remains low. This power consumption can be the order of 10 mA for a period of 100 ms.
- the invention also aims to provide a portable object for the implementation of implementation of the access control method.
- the processing unit is arranged to control the means transmission and / or receiving means for transmitting and / or receiving a encoded identification signal with an analog signature, which is defined by least a variation of amplitude of the envelope of the coded signal, said signature analogue being specific to either the portable object or the electronic means in space, or to the couple formed by the object and the space to be accessed, such than a vehicle.
- control method access to a specific space, such as a vehicle with a portable object consisting of preferably by an electronic key of active type.
- a specific space such as a vehicle with a portable object consisting of preferably by an electronic key of active type.
- a portable object consisting of preferably by an electronic key of active type.
- all electronic components of the vehicle and the portable object which are known to the skilled person in this technical field will not be described so Detailed.
- the portable object 2 must be find in a restricted area 5 around the electronic means of the vehicle 1 for implementing the access control method according to the invention.
- These means electronic means include transmitting means 11, 14 and / or means for receiving 12, 15 signals.
- the portable object 2 is preferably an active electronic key in which power supply means can supply all the components which contains the key.
- These feeding means may comprise a battery, accumulator, photovoltaic cells, mass generator oscillating or other well-known source of electrical energy.
- the electronic key 2 essentially comprises a processing unit of signals 26 connected to signal receiving means 21, 27, and to means 22, 28.
- the power consumption of the key is of the order of 5 ⁇ A in standby mode 99% of the time, and in the order of 10 mA during a 100 ms period when transmitting the high frequency coded signal.
- the reception means are composed of a receiving antenna 21 for receive a low frequency coded signal from the vehicle, and a receiver 27.
- the coded interrogation signal, received by the reception means comprises a sequence of binary data.
- the receiver LF 27, receiving the coded signal provides the sequence of binary data to a microcontroller 24 of the processing unit 26.
- This LF receiver 27 also includes an amplitude indicator (RSSI, Received Signal Strength Indicator in English terminology) providing values dynamic analog amplitude of the coded signal envelope received at a digital analog converter 23 of the processing unit 26.
- This converter digital analog 23 digitizes amplitude values provided by the indicator clocked by a clock signal of the order of 125 khZ. Scored values of amplitude, partially defining the analog signature, are compared with amplitude reference values. These reference values are stored in the storage means 25 of the processing unit 26, which are connected to the microcontroller.
- the amplitude of the coded signal is dependent on the distance between the vehicle and the key, it is rather the derivatives of the coded signal envelope or the amplitude differences, which are digitized and compared in the microcontroller 24 with stored reference values. After sampling at a frequency determined in the converter 23, it is possible to evaluate these derivatives or these deviations to identify the torque formed by the key and the vehicle.
- the LF receiver 27, which includes the amplitude indicator, may be the electronic component referenced EM4083 produced by the company EM Microelectronic-Marin SA located in Marin, Switzerland.
- the microcontroller 24, used in particular for the comparison of the amplitude values and for the calculation of a signal answer, can be the electronic component referenced EM6640 also produced by EM Microelectronic-Marin SA in Marin, Switzerland.
- a calculation of a response signal is performed in said microcontroller to control the transmission of this response signal to the transmitting means 22, 28.
- These means are composed of a UHF transmitter 28 and an antenna 22.
- a voltage-controlled oscillator of the transmitter is in principle used, which consumes a lot of electrical energy.
- the UHF transmitter 28 is not continuously snapped into the dongle to avoid unloading too quickly the source of energy that includes the key.
- This transmitter is not engaged only if the microcontroller 24 has recognized the analog signature of the signal interrogation received.
- This analog signature specifically defines the couple constituted by the personalized key and the vehicle, because it depends on characteristics transmission means and means for receiving the key and the vehicle.
- the coded interrogation signal transmitted by the vehicle comprises a carrier at a frequency of 125 kHz on which a sequence of binary data is obtained by amplitude modulation of the envelope of the carrier.
- Each element binary of the sequence is thus defined over a time period greater than the opposite of the carrier frequency.
- Each binary element takes the value 1, respectively 0, when the amplitude level of the envelope of the bit element of the encoded signal is greater or less than a threshold amplitude level determined.
- the coded interrogation signal is only captured at a distance of less than 2 m which defines the restricted area around the vehicle.
- the carrier frequency of the coded signal transmitted by the vehicle may be different from 125 kHz. It may be considered to fix this frequency carrier for example at 90 kHz.
- the response signal transmitted by the key to the vehicle comprises a carrier at a frequency of the order of 433 MHz. Normally at this frequency, the coding of the response signal is not obtained by amplitude modulation, because of the problems Well-known Multiple Paths would Influence Coding Recognition transmitted.
- the carrier frequency of this response signal may be different from 433 MHz.
- the value of this frequency signal carrier response may be dependent on certain country requirements where the access control method is applied. With such a carrier frequency, it It is possible to order parts or functions of the vehicle up to distance of 30 m.
- FIG. 5 represents a flowchart of the steps of the control method access of a personalized electronic key to the vehicle for locking or unlocking including doors and trunk of said vehicle according to the invention. he it should be noted that the steps of this FIG. 5, which correspond to that of FIG. bear identical reference signs.
- step 50 the electronic key carried by the user of the vehicle is in waiting position.
- an interrogation signal LF is transmitted by the means transmission in step 52 under the control of the access management means of the vehicle.
- the electronic key placed in the restricted area around the vehicle, receives the coded interrogation signal in step 70.
- the amplitude indicator of the RF receiver provides analog amplitude values to the converter.
- the converter digitizes these amplitude values in order to control these digitized amplitude values in the microcontroller, defining the signature analogue of the received signal, with stored values of reference. If the signature analog is not recognized, the electronic key goes to step 50 of setting waiting.
- the vehicle is identified step 53. If the vehicle is not recognized, the key is placed again in position waiting time in step 50. In case of recognition of the vehicle to be controlled, a signal response is calculated by a key processing unit in step 54. This signal high frequency response is transmitted by the antenna means of issuing the key in step 55. Finally, the vehicle reception means receives this response signal to enable the access management means to control the opening or the closing of the vehicle at step 56. It may also be planned to order this step 56, the function of starting the vehicle. In the latter case, instead of grasping the handle as explained above, it is for example the pommel of speed that is touched by the user's hand.
- the access control method it is not mandatory for example to enter the handle of the vehicle for the access control method to be activated. He can be considered any other means of detecting the presence of the key near the vehicle to instruct the vehicle to transmit a coded interrogation signal with an analog signature. Acoustic or optical means for example can be used to order the transmission of the coded interrogation signal of the vehicle.
- the analog signature of the coded signal is defined by at least one amplitude variation of the coded signal envelope.
- analog signatures are represented on the Figures 6a to 6c.
- the signals represented in these FIGS. 6a to 6c are for example those provided by the amplitude indicator.
- a coded interrogation signal transmitted by the vehicle comprises a data sequence obtained by amplitude modulation of the envelope of the coded signal.
- This data sequence is defined by a succession of binary elements.
- a binary element represents the value 1 when the amplitude of the envelope is above the threshold amplitude level As, while this binary element represents the value 0 when the amplitude of the envelope is below As a rule, the amplitude of the envelope defining the element binary 0 is close to 0.
- the sequence of data includes a succession of bits of different value.
- the sequence 1010101010 is shown in these figures 6a to 6c. Normally this sequence of data may represent a vehicle identification code.
- the analog signature transmitted and received in the coded signal identification is defined according to a growth time and / or a time of amplitude decrease ⁇ t of the coded signal envelope of the passage between two binary elements of different value from the data sequence.
- Variation amplitude during the growth and / or decay time can be linear or hyperbolic or random so as to specifically represent the couple consisting of the vehicle and the personalized key.
- digitized values provided by the converter of the processing unit allow to define derivatives of the curve of growth and / or decay of the envelope of the coded signal to be compared with stored reference values.
- this analog signature depends in particular on specific characteristics of the transmitting means and the receiving means of the key and the vehicle. Amplitude growth or decay of the envelope defining the signature can be obtained by an RC type resonator.
- the analog signature can be defined at the beginning or the end of the signal encoded, as a function of a growth time and / or amplitude decrease of the envelope of the coded signal.
- the analog signature transmitted and received in the coded signal identification is defined by over-amplitude modulation of the signal envelope code.
- This over-modulation is applied for example to the binary elements representing the value 1 of the data sequence. Amplitude growth of bits 1 is shown in this figure. However, it is also possible to predict a decrease in amplitude of the envelope of the series of said binary elements equal to 1 of the data sequence.
- the analog signature transmitted and received in the coded signal identification is defined by over-modulation of each bit.
- this over-amplitude modulation is applied only to the binary elements worth 1 of the data sequence.
- This over-modulation of each binary element equal to 1 may be a sinusoidal or pulsed variation rectangular amplitude of the envelope.
- Figure 7 more precisely represents the shape of the encoded signal in the case of an analog signature shown in Figure 6a.
- the principle of signing analog signal on a coded signal transmitted by a transmitter to a receiver may also apply to a space, such as a safe or an access door of a place secret.
- the portable object may be a watch, a badge, a telephone portable, a smart card with or without a power source.
- the analog signature can as well be transmitted in a response signal transmitted by the portable object.
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Abstract
Description
Claims (13)
- Procédé de contrôle d'accès d'un objet portable personnalisé (2) à un espace déterminé (1) par transmission sans fil d'un signal codé d'identification, des moyens électroniques, qui comprennent des moyens de gestion d'accès (13) reliés à des moyens de réception (12, 14) et/ou des moyens d'émission (11, 15) de signaux, étant prévus dans l'espace, et l'objet portable comprenant une unité de traitement (26) reliée à des moyens d'émission (22, 28) et/ou des moyens de réception (21, 27) de signaux, le procédé comprenant des étapes de :transmission d'un signal codé d'identification par les moyens d'émission de l'objet portable ou respectivement par les moyens d'émission prévus dans l'espace déterminé,réception du signal codé d'identification par les moyens de réception prévus dans l'espace ou respectivement par les moyens de réception de l'objet portable, lorsque l'objet se trouve dans une zone restreinte (5) autour des moyens électroniques prévus dans l'espace, etvérification du signal codé dans les moyens de gestion d'accès (13) ou respectivement dans l'unité de traitement (26) pour autoriser l'accès à l'espace, le procédé étant caractérisé en ce que le signal codé d'identification transmis et reçu comprend une signature analogique définie par au moins une variation d'amplitude de l'enveloppe du signal codé, ladite signature analogique étant spécifique soit aux moyens électroniques prévus dans l'espace (1), soit à l'objet portable (2), soit au couple constitué par l'objet portable personnalisé et les moyens électroniques prévus dans l'espace de manière à autoriser l'accès à l'espace en cas de reconnaissance de ladite signature.
- Procédé selon la revendication 1, caractérisé en ce que la variation d'amplitude définissant la signature analogique est obtenue par une sur-modulation de l'enveloppe du signal codé.
- Procédé selon la revendication 1, caractérisé en ce que le signal codé d'identification est défini par une séquence de données binaires obtenue par modulation d'amplitude du signal à fréquence porteuse déterminée, chaque élément binaire de la séquence étant défini sur une période temporelle supérieure à l'inverse de la fréquence porteuse, et en ce que chaque élément binaire prend la valeur 1, respectivement 0, lorsque le niveau d'amplitude de l'enveloppe de l'élément binaire du signal codé est supérieur, respectivement inférieur à un niveau seuil déterminé.
- Procédé selon la revendication 3, caractérisé en ce qu'une sur-modulation d'amplitude de l'enveloppe du signal codé est appliquée sur les éléments binaires de la séquence de données correspondant à la valeur 1 par croissance ou décroissance d'amplitude de l'enveloppe de la série desdits éléments binaires de la séquence, ou par plusieurs variations d'amplitude de l'enveloppe desdits éléments binaires valant 1, et en ce que le niveau d'amplitude de l'enveloppe du signal codé pour un élément binaire correspondant à la valeur 0 est proche de 0.
- Procédé selon l'une des revendications 1 ou 3, caractérisé en ce que la signature analogique transmise et reçue dans le signal codé d'identification est définie en fonction d'un temps de croissance et/ou un temps de décroissance d'amplitude de l'enveloppe du signal codé au début ou à la fin du signal codé, ou en fonction d'un temps de croissance et/ou de décroissance d'amplitude de l'enveloppe du signal codé du passage entre deux éléments binaires de valeur différente de la séquence de données, la variation d'amplitude pendant le temps de croissance et/ou de décroissance étant linéaire ou hyperbolique ou aléatoire.
- Procédé selon l'une des revendications précédentes, de contrôle d'accès d'un objet portale personnalisé (2), tel qu'une clé électronique, à un véhicule (1) de manière à commander le verrouillage ou le déverrouillage de parties ou fonctions du véhicule (1), le procédé étant caractérisé en ce qu'il comprend des étapes de :transmission par des moyens d'émission (11, 15) du véhicule d'un premier signal codé défini comme un signal d'interrogation (6, 8) avec une signature analogique spécifique au couple constitué par l'objet personnalisé et le véhicule,réception du signal d'interrogation par des moyens de réception (21, 27) de l'objet, lorsque l'objet se trouve dans une zone restreinte (5) autour des moyens d'émission (11, 15) du véhicule (1),comparaison de la signature analogique reçue avec une signature de référence mémorisée dans l'unité de traitement (26) de l'objet,calcul d'un deuxième signal codé défini comme un signal réponse dans l'unité de traitement de l'objet en cas de reconnaissance du la signature analogique spécifique, ettransmission du signal réponse (9, 10) afin de commander le verrouillage ou le déverrouillage de parties ou fonctions du véhicule.
- Procédé selon la revendication 6, caractérisé en ce qu'une signature analogique spécifique au couple constitué par le véhicule et l'objet portable personnalisé est transmise avec les premier et second signaux codés.
- Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un indicateur d'amplitude (27) de l'enveloppe du signal codé, prévu dans les moyens de réception (21, 27) de l'objet, tel qu'une clé électronique, ou de l'espace, tel qu'un véhicule, fournit des valeurs dynamiques d'amplitude de l'enveloppe du signal codé aux moyens de gestion (13) ou à l'unité de traitement (26) pour comparer la signature analogique reçue avec une signature référence mémorisée.
- Procédé selon la revendication 8, dans lequel l'unité de traitement de l'objet et/ou les moyens de gestion de l'espace comprennent un convertisseur analogique numérique (23), un microcontrôleur (24) de traitement des signaux et des moyens de mémorisation (25) qui comprennent notamment un algorithme de chiffrement et une signature de référence, caractérisé en ce que les valeurs d'amplitude fournies par l'indicateur sont numérisées par le convertisseur analogique numérique (23), en ce que le convertisseur cadencé par un signal d'horloge fournit des valeurs numérisées d'amplitude de l'enveloppe du signal codé reçu au microcontrôleur (24), et en ce que le microcontrôleur opère une comparaison entre les valeurs numérisées d'amplitude avec des valeurs d'amplitude de la signature de référence mémorisée.
- Objet portable personnalisé (2) pour la mise en oeuvre du procédé selon l'une des revendications précédentes, l'objet comprenant une unité de traitement (26) reliée à des moyens d'émission (22, 28) et/ou des moyens de réception (21, 27) de signaux, caractérisé en ce que l'unité de traitement est agencée pour commander les moyens d'émission et/ou les moyens de réception pour l'émission et/ou la réception d'un signal codé d'identification avec une signature analogique, qui est définie par au moins une variation d'amplitude de l'enveloppe du signal codé, ladite signature analogique étant spécifique soit aux moyens électroniques prévus dans l'espace, soit à l'objet portable (2), soit au couple constitué par l'objet et les moyens électroniques prévus dans l'espace à accéder, tel qu'un véhicule.
- Objet selon la revendication 10, caractérisé en ce qu'il comprend des moyens d'émission de signaux haute fréquence (22, 28) et des moyens de réception de signaux basse fréquence (21, 27), et en ce que les moyens de réception comprennent un indicateur d'amplitude (21) de l'enveloppe du signal codé reçu pour fournir des valeurs dynamiques d'amplitude de l'enveloppe du signal codé à l'unité de traitement (26) pour comparer la signature analogique reçue avec une signature référence mémorisée dans des moyens de mémorisation (25) de l'unité de traitement.
- Objet selon la revendication 11, caractérisé en ce que l'unité de traitement comprend un convertisseur analogique numérique (23) pour numériser les valeurs d'amplitude fournies par l'indicateur, et un microcontrôleur (24) de traitement des signaux pour comparer les valeurs numérisées d'amplitude fournies par le convertisseur avec des valeurs d'amplitude de la signature de référence mémorisée.
- Objet selon la revendication 10, caractérisé en ce que l'objet est une clé électronique disposant de moyens d'alimentation électrique des composants électroniques intégrés, les moyens d'alimentation comprenant une pile ou un accumulateur ou des cellules photovoltaïques ou un générateur à masse oscillante.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030013017 EP1378865B1 (fr) | 2002-07-05 | 2003-06-10 | Procédé de contrôle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02077681 | 2002-07-05 | ||
EP02077681A EP1378864A1 (fr) | 2002-07-05 | 2002-07-05 | Procédé de controle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé |
EP20030013017 EP1378865B1 (fr) | 2002-07-05 | 2003-06-10 | Procédé de contrôle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé |
Publications (2)
Publication Number | Publication Date |
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EP1378865A1 true EP1378865A1 (fr) | 2004-01-07 |
EP1378865B1 EP1378865B1 (fr) | 2008-04-30 |
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EP20030013017 Expired - Lifetime EP1378865B1 (fr) | 2002-07-05 | 2003-06-10 | Procédé de contrôle d'accès d'un objet portable personnalisé à un espace déterminé, et objet portable pour la mise en oeuvre du procédé |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006000235A1 (fr) * | 2004-06-23 | 2006-01-05 | Sommer Antriebs- Und Funktechnik Gmbh | Systeme de fermeture |
CN101231765B (zh) * | 2007-12-28 | 2011-05-11 | 何伟斌 | 一种信息储存器 |
CN103793671A (zh) * | 2013-12-31 | 2014-05-14 | 青岛中科软件股份有限公司 | 基于rfid的车辆管理终端 |
FR3007877A1 (fr) * | 2013-06-28 | 2015-01-02 | Continental Automotive France | Procede de securisation d'un systeme d'acces et/ou de demarrage main libre d'un vehicule utilisant des signaux de test |
CN104376606A (zh) * | 2014-11-11 | 2015-02-25 | 青岛龙泰天翔通信科技有限公司 | 一种基于射频识别技术的车辆管理*** |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105809753A (zh) * | 2014-12-31 | 2016-07-27 | 青岛中科软件股份有限公司 | 基于射频识别技术的车辆管理*** |
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US4783658A (en) * | 1985-08-12 | 1988-11-08 | Nissan Motor Company, Limited | Method and system for detecting encoded radio signals |
US5600323A (en) * | 1993-06-21 | 1997-02-04 | Valeo Electronique | Telecontrol system with a plurality of functional ranges selected by detection threshold |
FR2781075A1 (fr) * | 1998-07-09 | 2000-01-14 | Valeo Securite Habitacle | Systeme de securite pour un vehicule automobile comportant des moyens d'analyse de la distorsion d'un signal |
DE19839695C1 (de) * | 1998-09-01 | 2000-05-04 | Kostal Leopold Gmbh & Co Kg | Verfahren zum Durchführen einer schlüssellosen Zugangsberechtigungskontrolle sowie schlüssellose Zugangsberechtigungskontrolleinrichtung |
EP1152109A2 (fr) * | 2000-05-03 | 2001-11-07 | Delphi Technologies, Inc. | Système pour le démarrage et/ou l'accès mains libres d'un véhicule automobile |
FR2809895A1 (fr) * | 2000-06-02 | 2001-12-07 | Bosch Gmbh Robert | Dispositif et procede de mise en oeuvre d'un systeme d'autorisation |
WO2002017238A1 (fr) * | 2000-08-25 | 2002-02-28 | Robert Bosch Gmbh | Systeme de securite |
EP1288841A1 (fr) * | 2001-08-30 | 2003-03-05 | Motorola, Inc. | Système de communication répondeur passif |
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2003
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Publication number | Priority date | Publication date | Assignee | Title |
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US4783658A (en) * | 1985-08-12 | 1988-11-08 | Nissan Motor Company, Limited | Method and system for detecting encoded radio signals |
US5600323A (en) * | 1993-06-21 | 1997-02-04 | Valeo Electronique | Telecontrol system with a plurality of functional ranges selected by detection threshold |
FR2781075A1 (fr) * | 1998-07-09 | 2000-01-14 | Valeo Securite Habitacle | Systeme de securite pour un vehicule automobile comportant des moyens d'analyse de la distorsion d'un signal |
DE19839695C1 (de) * | 1998-09-01 | 2000-05-04 | Kostal Leopold Gmbh & Co Kg | Verfahren zum Durchführen einer schlüssellosen Zugangsberechtigungskontrolle sowie schlüssellose Zugangsberechtigungskontrolleinrichtung |
EP1152109A2 (fr) * | 2000-05-03 | 2001-11-07 | Delphi Technologies, Inc. | Système pour le démarrage et/ou l'accès mains libres d'un véhicule automobile |
FR2809895A1 (fr) * | 2000-06-02 | 2001-12-07 | Bosch Gmbh Robert | Dispositif et procede de mise en oeuvre d'un systeme d'autorisation |
WO2002017238A1 (fr) * | 2000-08-25 | 2002-02-28 | Robert Bosch Gmbh | Systeme de securite |
EP1288841A1 (fr) * | 2001-08-30 | 2003-03-05 | Motorola, Inc. | Système de communication répondeur passif |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006000235A1 (fr) * | 2004-06-23 | 2006-01-05 | Sommer Antriebs- Und Funktechnik Gmbh | Systeme de fermeture |
CN101231765B (zh) * | 2007-12-28 | 2011-05-11 | 何伟斌 | 一种信息储存器 |
FR3007877A1 (fr) * | 2013-06-28 | 2015-01-02 | Continental Automotive France | Procede de securisation d'un systeme d'acces et/ou de demarrage main libre d'un vehicule utilisant des signaux de test |
CN103793671A (zh) * | 2013-12-31 | 2014-05-14 | 青岛中科软件股份有限公司 | 基于rfid的车辆管理终端 |
CN104376606A (zh) * | 2014-11-11 | 2015-02-25 | 青岛龙泰天翔通信科技有限公司 | 一种基于射频识别技术的车辆管理*** |
Also Published As
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EP1378865B1 (fr) | 2008-04-30 |
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