CN102644419B - Dynamic password remote control lock based on chaos technology - Google Patents
Dynamic password remote control lock based on chaos technology Download PDFInfo
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- CN102644419B CN102644419B CN201210042293.0A CN201210042293A CN102644419B CN 102644419 B CN102644419 B CN 102644419B CN 201210042293 A CN201210042293 A CN 201210042293A CN 102644419 B CN102644419 B CN 102644419B
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Abstract
The invention relates to a dynamic password remote control lock based on the chaos technology. The password of the existing remote control lock has certain risk. The dynamic password remote control lock comprises a wireless transmitter, a wireless receiver and an electronic lock, wherein the wireless transmitter transmits a chaos rolling code which is received by the wireless receiver and subjected to algorithm comparison; and if the chaos rolling code is correct, the wireless receiver controls to unlock the electronic lock. According to the invention, the chaos technology is combined with the rolling code technology, the system is also provided with a fixed code, and the same chaos function is implanted into the transmitting and receiving modules; the pseudorandom sequence generated by the chaos function and the fixed code are used as keys; the function in the transmitting and receiving modules is iterated once for each remote control, and the value after the iteration is used for generating a new password; thus a different password is used each time, and the password used previously becomes invalid immediately, thereby realizing 'unique password each time'; after receiving the key, the receiver performs algorithm comparison; and the lock cannot be normally unlocked unless the algorithm comparison indicates that the key is correct, and thus the system safety is higher.
Description
Technical field
The invention belongs to wireless communication technology field, relate to a kind of dynamic password remote-controlled lock based on chaos technology.
Background technology
Along with the raising of people's life and the reinforcement of awareness of safety, the remote control password lock product that various vehicles or door and window are used is constantly released.The password of initial remote-controlled lock is fixed, and improves its confidentiality by the length that increases password.But because the fixing defect of password, so easily stolen password by special receiver, the theft of then unblanking.For addressing this problem, researchist has invented hopping code, in telechirics except regular coding, also increase synchronous counter, when each straighforward operation, synchronous numeration adds 1, forms encrypt data, and send with data such as key assignments together with regular coding after cryptographic algorithm is encrypted.Send all differences because synchronometer numerical value is each, no exception even same button is repeatedly pressed.Synchronous counting rolls forward automatically, and the code word of transmission can not occur again.After receiving end receives ciphertext, be decrypted by the decipherment algorithm of producer, after judgement is consistent, notice topworks carries out user command, because the hopping code numerical value change of falling into a trap is regular, encrypts together with regular coding, also has the risk being necessarily cracked.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of dynamic password remote-controlled lock based on chaos technology is provided.
The technical scheme that technical solution problem of the present invention is taked:
Dynamic password remote-controlled lock based on chaos technology, comprises wireless launcher, wireless receiver, electronic lock, wireless launcher transmitting chaos rolling code, received by wireless receiver, the line algorithm of going forward side by side comparison, if correct, is opened by wireless receiver control electronic lock;
Described wireless launcher is made up of the one 51 minimum system, a nrf905 wireless transmitter module, a 24C02 chip, the button of unblanking; After wireless launcher powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the one 51 minimum system can produce a chaotic key
, this chaos sequence key
entered a 24C02 chip by programming, when the button of unblanking is pressed, wireless launcher can read a chaos sequence key from 24C02 chip, and is transmitted to wireless receiver via a NRF905 wireless transmitter module;
Described wireless receiver is made up of the 2 51 minimum system, the 2nd nrf905 wireless receiving module, the 2nd 24C02 chip, electronic lock control module; After wireless receiver powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the 2 51 minimum system can produce 16 chaotic keys
; These 16 chaotic keys and its iterations n can be burned in the 2nd 24C02 chip.When the 2nd nrf905 wireless receiving module receives key
time, can with the 2nd 24C02 chip in 16 chaotic keys
, there are following two kinds of situations in comparison successively:
(1) if
with
any one is identical, and the success of chaotic key sequence alignment is described, wireless receiver can be controlled electronic lock control interface, opens electronic lock.Now, comparison successful situation under, wireless receiver with
for iterative initial value, substitution chaos equation:
Upgrading these 16 chaotic keys is
, for receiving key match next time.
(2) if
with
not identical, illustrate that chaotic key sequence alignment is unsuccessful.
Consider actual user situation, what possible situation was wireless launcher unblank, and button is repeatedly pressed in the situation that wireless interface receiver does not receive, and the chaotic key sequence of wireless launcher is repeatedly upgraded, and causes
numerical value exceeded 16 chaotic keys of wireless interface receiver storage
scope so that can not normally match.
Wireless receiver can be with
for initial value carries out the interative computation 2000 times of chaos equation, chaos equation is:
Get each iterative value
with
compare, if in 2000 interative computations, have
, to think and compare successfully, wireless receiver carries out the key updating in above-mentioned (1) and unblanks.If in 2000 interative computations, do not have
, think that comparison is unsuccessful, do not carry out key updating.
Beneficial effect of the present invention:
The present invention combines chaos technology with hopping code, this system is also provided with regular coding (sequence number), simultaneously in module, implant identical chaotic function transmitting and receiving, utilize chaotic function produce pseudo-random sequence and regular coding as key, every remote control once transmits and receives function iteration in module once, with the value generation new password after iteration, the password of so each use is all different, and front nonrecoverable password lost efficacy immediately, accomplish " one-time pad ", receiver is receiving the laggard line algorithm comparison of key, only have algorithm comparison correctly could normally unblank, make security of system higher.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention;
Fig. 2 wireless launcher schematic diagram;
Fig. 3 wireless receiver schematic diagram;
Fig. 4 NRF905 wireless transmit and receiver module circuit theory diagrams;
Fig. 5 24C02 memory module schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, chaos rolling code wireless remote control locking device, whole system is divided into three ingredients, wireless launcher, wireless receiver, electronic lock.
As shown in Figure 2, wireless launcher is made up of the one 51 minimum system, a nrf905 wireless transmitter module, a 24C02 chip, the button of unblanking; After wireless launcher powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the one 51 minimum system can produce a chaotic key
, this chaotic key
entered a 24C02 chip by programming, when the button of unblanking is pressed, wireless launcher can read a chaotic key from 24C02 chip, and is transmitted to wireless interface receiver via a NRF905 wireless transmitter module;
Each chaos sequence key
for the data of 32bit, and be brought into chaos equation as previous iteration value
In produce next chaotic key
.By that analogy, press beginning button at every turn, no matter whether receiver receives, the chaotic key that the chaos system of transmitter all can read by a 24C02 chip
, produce new chaotic key
, and by the chaotic key reading
launch by NRF905 chip, by new chaos sequence key
in burned 24C02 chip, substitute original
, so repeatedly, each chaotic key is only used once, no longer reuses.
As shown in Figure 3, described wireless receiver is made up of the 2 51 minimum system, the 2nd nrf905 wireless receiving module, the 2nd 24C02 chip, electronic lock control module;
After wireless receiver powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the 2 51 minimum system can produce 16 chaotic keys
; These 16 chaotic keys and its iterations n can be burned in the 2nd 24C02 chip.When the 2nd nrf905 wireless receiving module receives key
time, can with the 2nd 24C02 chip in 16 chaotic keys
, there are following two kinds of situations in comparison successively:
(1) if
with
any one is identical, and the success of chaotic key sequence alignment is described, wireless receiver can be controlled electronic lock control interface, opens electronic lock.Now, comparison successful situation under, wireless receiver with
for iterative initial value, substitution chaos equation:
Upgrading these 16 chaotic keys is
, for receiving key match next time.
(2) if
with
not identical, illustrate that chaotic key sequence alignment is unsuccessful.
Consider actual user situation, what possible situation was wireless launcher unblank, and button is repeatedly pressed in the situation that wireless interface receiver does not receive, and the chaotic key sequence of wireless launcher is repeatedly upgraded, and causes
numerical value exceeded 16 chaotic keys of wireless interface receiver storage
scope so that can not normally match.
Wireless receiver can be with
for initial value carries out the interative computation 2000 times of chaos equation, chaos equation is:
Get each iterative value
with
compare, if in 2000 interative computations, have
, to think and compare successfully, wireless receiver carries out the key updating in above-mentioned (1) and unblanks.If in 2000 interative computations, do not have
, think that comparison is unsuccessful, do not carry out key updating.
Fig. 4 is the same for transmitting and receiving wireless module physical circuit figure, transmitting and receiving hardware circuit, it is set for sending mode or receiving mode by software.
Adopt nRF905 monolithic radio frequency emitter chip, its operating voltage is 1.9-3.6V, and 32 pin QFN encapsulation (5mm × 5mm), work in 433/868/915MHz3 ISM channel (can freely use).
NRF905 can automatically complete and process prefix and CRC(CRC) work, can automatically complete Manchester's cde/decoding by hardware in sheet, use SPI interface and micro-controller communications, configure very convenient, its power consumption is very low, during with the output power transmitting of-10dBm, electric current only has 11mA, and in the time of receiving mode, electric current is 12.5mA.The work of nRF905 monolithic wireless transceiver is by a fully-integrated frequency modulator, a receiver with detuner, a power amplifier, a crystal oscillator and a regulator composition.The feature of ShockBurst mode of operation is automatically to produce lead code and CRC, can be easy to carry out programmed configurations by SPI interface.
Be characterized in, have the matching addresses position of 32 four bytes, two nRF905, in communication process, only have the matching addresses position of these four bytes identical, could normal swap data, this in the Software for Design of this telechirics as the ground floor authentication information of Remote control electronic lock.
Fig. 5 is for transmitting and receiving device memory circuit
Adopt 24c02 chip, it is the memory device of Serial E 2PROM based on I2C-BUS, follows two-wire system agreement, and due to it, to have interface convenient, and volume is little, and data power down such as does not lose at the feature, in instrument and meter and industrial automatic control, gets a lot of applications.Its inner institutional framework that adopts 256*8bit; capacity is 2k bit; adopt two-wire serial interface; and the Low Voltage Technique using; the minimum voltage that can move is 1.8v, and its erasing and writing life is 1,000,000 times, and the data holding time is 100 years; and there is data hardware write-protection function, can well be applied in removable handheld device.
Below produce formula and the explanation of algorithm for chaotic key
Chaos is the peculiar a kind of forms of motion of Kind of Nonlinear Dynamical System, and chaotic signal has abundant Nonlinear Dynamical Characteristics.Pertinent literature also conducts in-depth research for chaotic characteristic both at home and abroad at present.The variation extreme sensitivity of chaos system to initial value, the class signal of generation, like noise, has pseudo-randomness, thereby is specially adapted to field of encryption.Utilize just the good pseudo-randomness of chaos system to produce key rolling code, due to " one-time pad " technology of employing, be that each key rolling code is only used once, and chaos system itself has high susceptibility for key, the security of the chaos rolling code electronic lock of design is greatly improved, can effectively resists to intercept and capture to attack with Brute Force and attack.
The present invention adopts novel C ubic chaotic maps as chaos system in sheet, and its expression formula is:
In formula: a, b is control parameter, when
time system in chaos state, now
span double along with the increase of a, meet
, and there is extremely complicated dynamic behavior.
The major impetus characteristic of system can be analyzed by its Lyapunov exponential sum bifurcation graphs, positive Lyapunov index shows tracks local instability, on adjacent track, velocity of separation is fast, but is stable on the whole, and athletic meeting forms chaotic attractor repeatedly.Negative Lyapunov index shows phase volume contraction, and track is stable in part, insensitive to starting condition, corresponding periodic orbit motion.When fixing
,
, obtain variable x with not
change bifurcation graphs and Lyapunov index with
the index spectrogram changing.
According to Lyapunov index spectrogram and system bifurcation diagram, system exists
in,
; ?
in, be the cycle 1; ?
in, be the cycle 2; With
increase, occur doubling time;
time there is chaos phenomenon, and work as
time Lyapunov index obtain maximal value, now chaos system is full mapping.
Chaos system is got
,
,
obtain its time-domain diagram.
Can be obtained by time-domain diagram, when
time, can be by adjusting parameter
control
variation range, be
between, can improve greatly the scope of each iterative value.
Improved Cubic mapping is carried out to initial value sensitivity tests, get
,
, get respectively initial value
be 20.0000001 and 20.0000002, carry out the result after interative computation 100 times, represent the number of times of iteration with transverse axis, the longitudinal axis represents the value result after iteration, solid line represents that initial value is 20.0000001 iteration track, and dotted line represents that initial value is 20.0000002 iteration track.Both initial values only differ
, but by after 100 iteration, two results have this explanation chaos sequence of very large difference very responsive to initial value.By preset initial value, can produce different chaos sequences, its sequence quantity is considerable.
Claims (1)
1. the dynamic password remote-controlled lock based on chaos technology, comprises wireless launcher, wireless receiver, electronic lock, it is characterized in that: wireless launcher transmitting chaos sequence key, received by wireless receiver, the line algorithm of going forward side by side comparison, if correct, is opened by wireless receiver control electronic lock;
Described wireless launcher is made up of the one 51 minimum system, a nrf905 wireless transmitter module, a 24C02 chip, the button of unblanking; After wireless launcher powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the one 51 minimum system can produce a chaos sequence key x
n, this chaos sequence key x
nentered a 24C02 chip by programming, when the button of unblanking is pressed, wireless launcher can read a chaos sequence key from a 24C02 chip, and is transmitted to wireless receiver via a nrf905 wireless transmitter module;
Described wireless receiver is made up of the 2 51 minimum system, the 2nd nrf905 wireless receiving module, the 2nd 24C02 chip, electronic lock control module; After wireless receiver powers on, carry out initial work, the chaos system in 51 single-chip microcomputers in the 2 51 minimum system can produce 16 chaotic key x '
n, x '
n+1, x '
n+2... x '
n+13, x '
n+14, x '
n+15; These 16 chaotic keys and its iterations n can be burned in the 2nd 24C02 chip; When the 2nd nrf905 wireless receiving module receives chaos sequence key x
ptime, can with the 2nd 24C02 chip in 16 chaotic key x '
n, x '
n+1, x '
n+2... x '
n+13, x '
n+14, x '
n+15, there are following two kinds of situations in comparison successively:
(1) if x
pwith x '
n, x '
n+1, x '
n+2... x '
n+13, x '
n+14, x '
n+15any one is identical, illustrates that chaos sequence key compares successfully, and wireless receiver can be controlled electronic lock control module, opens electronic lock; Now, in the successful situation of comparison, wireless receiver is with x
pfor iterative initial value, substitution chaos equation:
Upgrading these 16 chaotic keys is x
p, x
p+1, x
p+2... x
p+14, x
p+15, for receiving key match next time; Wherein a, b is for controlling parameter, and system is in chaos state when b ∈ (2.4,3);
(2) if x
pwith x '
n, x '
n+1, x '
n+2... x '
n+13, x '
n+14, x '
n+15not identical, illustrate that chaotic key sequence alignment is unsuccessful;
Consider actual user situation, what possible situation was wireless launcher unblank, and button is repeatedly pressed in the situation that wireless receiver does not receive, and the chaotic key sequence of wireless launcher is repeatedly upgraded, and causes x
pnumerical value exceeded 16 chaotic key x ' of wireless receiver storage
n, x '
n+1, x '
n+2... x '
n+13, x '
n+14, x '
n+15scope so that can not normally match;
Wireless receiver can be with x
nfor initial value carries out the interative computation 2000 times of chaos equation, chaos equation is:
Get each iterative value x
nwith x
pcompare, if in 2000 interative computations, have x
n=x
p, to think and compare successfully, wireless receiver carries out the key updating in above-mentioned (1) and unblanks; If in 2000 interative computations, there is no x
n=x
p, think that comparison is unsuccessful, do not carry out key updating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210042293.0A CN102644419B (en) | 2012-02-23 | 2012-02-23 | Dynamic password remote control lock based on chaos technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210042293.0A CN102644419B (en) | 2012-02-23 | 2012-02-23 | Dynamic password remote control lock based on chaos technology |
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| Publication Number | Publication Date |
|---|---|
| CN102644419A CN102644419A (en) | 2012-08-22 |
| CN102644419B true CN102644419B (en) | 2014-07-09 |
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| CN201210042293.0A Expired - Fee Related CN102644419B (en) | 2012-02-23 | 2012-02-23 | Dynamic password remote control lock based on chaos technology |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453456B (en) * | 2014-09-29 | 2017-02-22 | 江苏农林职业技术学院 | Automobile lock unlocking method |
| CN106530470A (en) * | 2016-12-14 | 2017-03-22 | 余仁植 | Vehicle unlocking method, lock unlocking device, vehicle and vehicle system |
| CN109166269A (en) * | 2018-08-30 | 2019-01-08 | 中国建筑科学研究院有限公司 | Fire early warning device and system based on wireless communication |
| CN109754503A (en) * | 2018-12-12 | 2019-05-14 | 胡渐佳 | Intelligent door lock method for unlocking |
| CN111682933B (en) * | 2020-06-17 | 2023-05-09 | 湖南科技大学 | Dynamic password electronic lock based on multi-parameter five-dimensional hyper-chaotic system |
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|---|---|---|---|---|
| CN1078835A (en) * | 1992-05-12 | 1993-11-24 | 浙江大学 | Based on " chaos " theoretical signal encryption method and system |
| WO2002025038A2 (en) * | 2000-09-22 | 2002-03-28 | Kim, Won-Chol | Electronic locking apparatus and control method thereof |
| CN101662636A (en) * | 2009-09-10 | 2010-03-03 | 中国科学院声学研究所 | Safe high-speed differential serial interface |
| CN101706946A (en) * | 2009-11-26 | 2010-05-12 | 大连大学 | Digital image encryption method based on DNA sequence and multi-chaotic mapping |
| TWI343443B (en) * | 2008-06-23 | 2011-06-11 | Univ Shu Te | |
| CN102184506A (en) * | 2011-05-10 | 2011-09-14 | 南通大学 | Digital anti-counterfeiting method based on chaos password encryption |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7937427B2 (en) * | 2007-04-19 | 2011-05-03 | Harris Corporation | Digital generation of a chaotic numerical sequence |
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2012
- 2012-02-23 CN CN201210042293.0A patent/CN102644419B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078835A (en) * | 1992-05-12 | 1993-11-24 | 浙江大学 | Based on " chaos " theoretical signal encryption method and system |
| WO2002025038A2 (en) * | 2000-09-22 | 2002-03-28 | Kim, Won-Chol | Electronic locking apparatus and control method thereof |
| TWI343443B (en) * | 2008-06-23 | 2011-06-11 | Univ Shu Te | |
| CN101662636A (en) * | 2009-09-10 | 2010-03-03 | 中国科学院声学研究所 | Safe high-speed differential serial interface |
| CN101706946A (en) * | 2009-11-26 | 2010-05-12 | 大连大学 | Digital image encryption method based on DNA sequence and multi-chaotic mapping |
| CN102184506A (en) * | 2011-05-10 | 2011-09-14 | 南通大学 | Digital anti-counterfeiting method based on chaos password encryption |
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