CN101265769B - Password distant control lock control system based on AES cryptographic algorithm and control method - Google Patents
Password distant control lock control system based on AES cryptographic algorithm and control method Download PDFInfo
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- CN101265769B CN101265769B CN2008100179868A CN200810017986A CN101265769B CN 101265769 B CN101265769 B CN 101265769B CN 2008100179868 A CN2008100179868 A CN 2008100179868A CN 200810017986 A CN200810017986 A CN 200810017986A CN 101265769 B CN101265769 B CN 101265769B
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Abstract
The invention discloses a password remote lock control system based on the AES cryptographic algorithm, which comprises a key unit and a lock unit. The key unit is composed of a timer A, a keyboard and a receiver A, a decoder A, a processor A, a random number generator A, an encipher A and a transmitter A connected in sequence; the lock unit is composed of a timer B and a transmitter B, an encipher B, a random number generator B, a processor B, a decoder B and a receiver B connected in sequence. By adopting the 256-bit key AES cryptographic algorithm, the password remote lock control system encrypts the time-variant random numbers and carries out the bidirectional communication transmission between the key and the lock, thereby avoiding being decoded by the prior various decoding manners, maximizing security, reliability and compatibility of the password remote lock and protecting a user's property.
Description
Technical field
The invention belongs to the safe practice field, relate to a kind of cipher remote control lock control system, be specifically related to a kind of cipher remote control lock control system, the invention still further relates to the control method of this system based on the AES cryptographic algorithm.
Background technology
The cipher remote control lock is widely used in burglary-resisting system such as motor central lock (central authorities' control door lock), floor, door and window because of its fail safe and convenience.Its operation principle is, key produces random number and encrypts by cryptographic algorithm, sends the signal of an encryption to lock, and lock obtains behind the coded signal that key sends through handling, and whether checking mates.If coupling, lock produce answer signal and by after the cryptographic algorithm encryption, feed back to key, simultaneously, carry out corresponding action.If do not match, lock is not carried out corresponding action.
Existing motor central lock possesses the warning unblanked, lock, close, opens basic function such as boot.But its Cipher Strength is very weak.Fast development along with computer technology, the lawless person utilizes the existing cryptographic algorithm of grasp, design and manufacture the decipher that can crack motor central lock, the signal of most of central controlled locks is intercepted and captured and deciphered, utilize electronics to crack means and enter automobile, modes such as use short circuit startup power supply start vehicle, cause automobile stolen repeatedly.Many local automobiles, the stolen case of especially high-grade automobile is in ascendant trend.In the face of the situation of utilizing high-tech means that other people property is encroached on, the unable reply of cryptographic capabilities of existing central controlled lock.Because existing central controlled lock mostly adopts 8 or 12 secret key encryptions, use traditional communications mode to transmit signal, had fairly perfect crack method.
At present, existing high-end car has been realized keyless access system (Keyless Entry System), but facts have proved, that the encryption performance of this system exists is underground, cryptographic algorithm is without check, encryption key bit wide defect of insufficient.How the motor central lock alarm is carried out more strict encryption, become a problem that can not be ignored.
AES (The Advanced Encryption Standard) is the Advanced Encryption Standardalgorithm that a new generation of U.S. research and development can be used for protecting electronic data, has strong security, high-performance, high efficiency, advantage such as easy-to-use and flexible.To in coming few decades, replace DES (Data EncryptionStandard) cryptographic algorithm that generally adopts now, in every field, be used widely.
AES is the password of a symmetric key, grouping, iteration, can use 128,192 and 256 keys, and corresponding iteration wheel number is 10 to take turns, 12 take turns, 14 take turns, and with 128 (16 byte) block encryption and data decryptions.Comparatively speaking, 256 of AES keys are stronger by 2 than 56 keys of DES
200Doubly.
Symmetric key cipher is used identical secret key encryption and data decryption; The figure place of the enciphered data of block cipher output is identical with the figure place of input data; Iterative cryptographic uses a loop structure, repeats displacement (permutations) and replace (substitutions) input data in this circulation.
Summary of the invention
The purpose of this invention is to provide a kind of random cipher remote control lock control system based on the AES cryptographic algorithm, more strict encryption is carried out in communication to the cipher remote control lock, strengthen the Cipher Strength of cipher remote control lock, guarantee that the signal that sends has confidentiality preferably, is difficult to crack.
Another object of the present invention provides the control method of above-mentioned control system.
The technical solution adopted in the present invention is, a kind of cipher remote control lock control system based on the AES cryptographic algorithm comprises key unit and lock unit,
Key unit is made up of timer A, keyboard and continuous successively receiver A, decipher A, processor A, randomizer A, encryption equipment A and transmitter A,
Lock unit is made up of with the transmitter B that links to each other successively, encryption equipment B, randomizer B, processor B, decipher B, receiver B timer B,
Timer A is connected with receiver A, decipher A, processor A, randomizer A and transmitter A respectively,
Decipher A is connected with randomizer A,
Keyboard is connected with transmitter A with randomizer A respectively,
Timer B is connected with transmitter B, processor B and receiver B respectively.
Another technical scheme of the present invention is, a kind of method of utilizing above-mentioned control system to carry out the cipher remote control lock control is carried out according to the following steps:
Step 1: the randomizer A of key unit produces random number A
nA
n' B
n, this random number is encrypted through the AES of 256 keys cryptographic algorithm and is obtained ciphertext F
256(A
nA
n' B
n), then, this ciphertext is sent to lock unit;
Lock unit was in initial wait state and produced one group of random number B by randomizer B before the signal that receives the key unit transmission
nB
n' A
N-1
Step 2: lock unit receives the ciphertext F that key unit sends
256(A
nA
n' B
n), the deciphering flow process in the AES cryptographic algorithm of 256 of this ciphertext employings is decrypted, obtain expressly F
256 -1(A
nA
n' B
n); Afterwards,
The plaintext F that deciphering is obtained
256 -1(A
nA
n' B
n) and the described random number B of step 1
nB
n' A
N-1Compare, judge the B that comprises in two groups of numbers
nWhether equate, if
1) B
nUnequal, the randomizer B of lock unit produces random number B
N+1B
N+1' A
N-1, this random number is encrypted through 256 AES cryptographic algorithm, obtains ciphertext F
256(B
N+1B
N+1' A
N-1), and this ciphertext sent to key unit, simultaneously, lock unit returns wait state, at this moment,
The ciphertext F that key unit receives
256(B
N+1B
N+1' A
N-1), be unmatched signal, this time communication failure;
2) B
nEquate that the randomizer B of lock unit produces random number B
N+1B
N+1' A
n, this random number is encrypted through the AES of 256 keys cryptographic algorithm, obtains ciphertext F
256(B
N+1B
N+1' A
n), and this ciphertext sent to key unit, enter
Step 3: key unit receives ciphertext F
256(B
N+1B
N+1' A
n), to of the deciphering flow process deciphering of this ciphertext, obtain expressly F with the AES cryptographic algorithm of 256 keys
256 -1(B
N+1B
N+1' A
n), then,
To receive ciphertext F
256(B
N+1B
N+1' A
n) and the described ciphertext F that sends of step 2
256(A
nA
n' B
n) between the time interval and the time of setting compare, if
1) this time interval surpasses the time of setting, then will plaintext F
256 -1(B
N+1B
N+1' A
n) directly send to randomizer A;
2) this time interval does not surpass the time of setting, and enters
Step 4: with the described initial plaintext A of step 1
nA
n' B
nThe plaintext F that obtains with the described deciphering of step 3
256 -1(B
N+1B
N+1' A
n) compare, judge the A in this two plaintext
nWhether equate, if,
1) A
nUnequal, randomizer A produces random number A
N+1A
N+1' B
n, and this random number is transferred to keyboard, through keyboard scan, key unit returns initial wait state;
2) A
nEquate that randomizer A produces random number A
N+1A
N+1' B
N+1, this random number is encrypted through the AES of 256 keys cryptographic algorithm, obtains ciphertext F
256(A
N+1A
N+1' B
N+1), when this ciphertext was sent to lock unit, key unit returned initial wait state;
Step 5: lock unit receives ciphertext F
256(A
N+1A
N+1' B
N+1), the deciphering flow process deciphering of this ciphertext in the AES of 256 keys cryptographic algorithm obtains expressly F
256 -1(A
N+1A
N+1' B
N+1), then, to step 2 2) described in ciphertext F
256(B
N+1B
N+1' A
n) and receive ciphertext F
256(A
N+1A
N+1' B
N+1) between the time interval and the time of setting compare, if
1) this time interval surpasses the time of setting, and then lock unit directly turns back to initial condition, waits for communication next time;
2) this time interval does not surpass the time of setting, and then enters
Step 6: to the described plaintext F of step 5
256 -1(A
N+1A
N+1' B
N+1) and ciphertext F
256(B
N+1B
N+1' A
n) compare, judge B
N+1Whether equate, if
1) B
N+1Unequal, then lock unit turns back to initial wait state;
2) B
N+1Equate that lock unit is carried out corresponding actions.Afterwards, turn back to initial wait state.
The invention has the beneficial effects as follows
1. except possessing the basic function of existing motor central lock, also can expand and realize that keyless access system, key leave function such as automatically lock.
2. under the prerequisite of not using the keyless access system function, compatible fully with existing motor central lock system.
3. have powerful encryption function, the inventive method and oil-feeding device for engine are united after the use, even utilize the mode of violence picking lock also can't utilize modes such as short circuit start-up circuit to start vehicle into the car.
4. avoided the cipher remote control lock to be cracked, improved fail safe, reliability, the compatibility of cipher remote control lock to greatest extent, protected user's property by the existing various modes that crack.
5.AES cryptographic algorithm belongs to the public encryption algorithm, and is real-time, safe, do not have leak at present.256 bit cipher key lengths have strengthened the reliability of encrypting, and utilize Brute Force need spend long time.Brute Force machine with computing in second 1GHz time is an example, and crack 256 bit cipher key lengths needs 3.67 * 10
60Year.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of remote control lock control system of the present invention;
Fig. 2 is the flow chart of remote control lock control system of the present invention; Wherein, a is the flow chart of key unit, and b is the flow chart of lock unit;
Fig. 3 be remote control lock control system of the present invention and other control system of the same type crack the intensity contrast schematic diagram.
Among the figure, 1. key unit, 2. lock unit.
Wherein, 1-1. receiver A, 1-2. decipher A, 1-3. processor A, 1-4. randomizer A, 1-5. keyboard, 1-6. encryption equipment A, 1-7. transmitter A, 1-8. timer A, 2-1. transmitter B, 2-2. encryption equipment B, 2-3. randomizer B, 2-4. processor B, 2-5. decipher B, 2-6. receiver B, 2-7. timer B.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The structure of a kind of embodiment of remote control lock control system of the present invention, as shown in Figure 1.Comprise key unit 1 and lock unit 2.
Timer A 1-8 is connected with receiver A 1-1, decipher A1-2, processor A 1-3, randomizer A 1-4 and transmitter A 1-7 respectively; Keyboard 1-5 is connected with transmitter A 1-7 with randomizer A 1-4 respectively; Decipher A1-2 is connected with randomizer A 1-4.
Lock unit 2 is made up of with the transmitter B 2-1 that is connected successively, encryption equipment B 2-2, randomizer B 2-3, processor B 2-4, decipher B 2-5, receiver B 2-6 timer B 2-7.
Timer B 2-7 is connected with receiver B2-6 with transmitter B2-1, processor B 2-4 respectively.
Minimize for cipher remote control lock control system of the present invention is reached, the decipher in the system, randomizer and encryption equipment can use identical parts, possess the function of encryption, deciphering and generation random number simultaneously.
Cipher remote control lock control system of the present invention, the form of employing application-specific integrated circuit (ASIC).
Cipher remote control lock control system of the present invention, adopt the AES Advanced Encryption Standardalgorithm and select 256 keys of maximum intensity for use, random signal to key unit in the system 1 and lock unit 2 generations is encrypted, by the repeatedly two-way communication of coded signal between key unit 1 and lock unit 2, realize control to system.
The control method of remote control lock control system of the present invention, carry out according to the following steps:
The randomizer A 1-4 of key unit 1 produces one group of plaintext array A at random
nA
n' B
n, this at random array adopt the AES cryptographic algorithm of 256 keys to encrypt through encryption equipment A 1-6, obtain ciphertext F
256(A
nA
n' B
n), and this ciphertext is transferred to transmitter A 1-7, transmitter A 1-7 sends to lock unit 2 with this ciphertext.
Lock unit 2 receives before the ciphertext signal of key unit 1 transmission, and randomizer B 2-3 produces one group of random number B
nB
n' A
N-1, afterwards, lock unit 2 is in wait state (at regular intervals, timer B2-7 sends a signal, and lock unit 2 is carried out initialize routine, resets).The workflow of lock unit 2 is shown in Fig. 2 b.The receiver B 2-6 of lock unit 2 receives the ciphertext F that key unit 1 sends
256(A
nA
n' B
n), this ciphertext is passed to decipher B 2-5, the deciphering flow process deciphering in the AES cryptographic algorithm of 256 keys of decipher B 2-5 employing obtains expressly F
256 -1(A
nA
n' B
n).
Then, with this plaintext transmission to processor B 2-4, by processor B 2-4, the initial random number B that randomizer B 2-3 is produced
nB
n' A
N-1The plaintext F that deciphering obtains with process decipher B 2-5
256 -1(A
nA
n' B
n) compare, determine B
nWhether equate.
If B
nUnequal, processor B 2-4 sends instruction to randomizer B 2-3, and randomizer B 2-3 produces random number B
N+1B
N+1' A
N-1, this random number is encrypted with 256 AES cryptographic algorithm through encryption equipment B 2-2, produces ciphertext F
256(B
N+1B
N+1' A
N-1), this ciphertext sends to key unit 1 by transmitter B 2-1, and simultaneously, lock unit 2 turns back to wait state.At this moment, the ciphertext F that transmits of the lock unit 2 that receives of the receiver A 1-1 of key unit 1
256(B
N+1B
N+1' A
N-1) be unmatched signal, this time communication is unsuccessful.
If B
nEquate that processor B 2-4 also sends instruction to randomizer B 2-3, randomizer B 2-3 produces another group random number B
N+1B
N+1' A
n, this random number is encrypted with 256 AES cryptographic algorithm through encryption equipment B 2-2, produces ciphertext F
256(B
N+1B
N+1' A
n), this ciphertext sends to key unit 1 by transmitter B 2-1.
The workflow of key unit 1 is shown in Fig. 2 a.The receiver A 1-1 of key unit 1 receives the ciphertext F that lock unit 2 is sent
256(B
N+1B
N+1' A
n), and this ciphertext passed to decipher A 1-2, through the deciphering flow process deciphering of decipher A 1-2, obtain expressly F by the AES cryptographic algorithm of 256 keys
256 -1(B
N+1B
N+1' A
n).Simultaneously, by timer A 1-8, transmitter A1-7 is sent ciphertext F
256(A
nA
n' B
n) and this receiver A 1-1 receive ciphertext F
256(B
N+1B
N+1' A
n) between the time interval and the time of setting compare.
If this time interval surpasses the time that timer A 1-8 sets, send signal by timer A 1-8, the plaintext F that decipher A1-2 obtains deciphering
256 -1(B
N+1B
N+1' A
n) directly issue randomizer A 1-4.
If this time interval does not surpass the time that timer A 1-8 sets, then by the initial plaintext A of processor A 1-3 to key unit 1
nA
n' B
nThe plaintext F that obtains through decipher A 1-2 deciphering that returns with lock unit 2
256 -1(B
N+1B
N+1' A
n) compare, judge A
nWhether equate.
If A
nUnequal, then processor A 1-3 sends signal to randomizer A 1-4, and randomizer A 1-4 produces random number A
N+1A
N+1' B
n, and this random number sent to keyboard 1-5, by keyboard 1-5 scanning and turn back to the wait state of key unit 1.
If A
nEquate that processor A 1-3 also sends a signal to randomizer A 1-4, randomizer A 1-4 produces random number A
N+1A
N+1' B
N+1, this random number adopts the AES cryptographic algorithm of 256 keys to encrypt through encryption equipment A 1-6, obtains ciphertext F
256(A
N+1A
N+1' B
N+1), this ciphertext sends to lock unit 2 by transmitter A 1-7, and key unit 1 turns back to the beginning of current circulation, waits for keyboard 1-5 scanning.
The receiver B 2-6 of lock unit 2 receives the ciphertext F that key unit 1 is sent
256(A
N+1A
N+1' B
N+1), and this ciphertext being transferred to decipher B 2-5, decipher B 2-5 adopts the deciphering flow process deciphering in the AES cryptographic algorithm of 256 keys to this ciphertext, obtain expressly F
256 -1(A
N+1A
N+1' B
N+1).
Simultaneously, by timer B 2-7, lock unit 2 is sent ciphertext F
256(B
N+1B
N+1' A
n) and this receive key unit 1 and return ciphertext F
256(A
N+1A
N+1' B
N+1) between the time interval and the time of setting compare.
If this time interval surpasses the time that timer B 2-7 sets, then lock unit 2 directly turns back to wait state, waits for communication next time.
If this time interval does not surpass the time that timer B 2-7 sets, then by the processor B 2-4 plaintext F that deciphering obtains to decipher B2-5
256 -1(A
N+1A
N+1' B
N+1) the ciphertext F that sends to key unit 1 with lock unit 2
256(B
N+1B
N+1' A
n) compare, determine B
N+1Whether equate.
If B
N+1Unequal, then lock unit 2 turns back to wait state.
If B
N+1Equate that lock unit 2 is carried out corresponding actions.Afterwards, turn back to wait state, wait for communication next time.
A
n', B
n', A
N+1' and B
N+1' be the anti-information that cracks of redundancy of adding in the system communication process.
Cipher remote control lock control system of the present invention and coded lock of the same type crack strength ratio, as shown in Figure 3.Show among the figure that the intensity that cracks that cracks intensity much larger than coded lock of the same type of the present invention makes and utilizes violence that the difficulty that cipher remote control lock control system of the present invention cracks is increased greatly.
The characteristics of cipher remote control lock control system of the present invention:
With the AES cryptographic algorithm with the time random number communications mode that becomes combine, strengthened the fail safe and the reliability of cipher remote control lock.Adopt two-way communication between the lock ﹠ key, when detecting key, lock unit left certain distance, and environment (for example satisfies certain condition, unmanned etc. in the car) time, the lock unit of cipher remote control lock can be carried out corresponding actions, makes car enter locking states, comprises and closes door lock, vehicle window, boot, simultaneously, cut off oil circuit, circuit and startup function etc.
After lock unit 2 and key unit 1 communicated by letter at every turn, the capital produces corresponding random number by randomizer, this random number can only be unified to handle between lock unit 2 and key unit 1 and coupling, the time random number communications mode that becomes be primarily aimed at that existing decoder is each to be sent identical data and easily intercepted and captured, retransmit.
Signal of communication between key and the lock is disturbed, intercept and capture or shielding, and this communication is interrupted, and can also carry out next time with not being affected safely and communicate by letter.But intercepting and capturing side does not have ability to obtain lock unit 2 through issuing the random number of key unit 1 after upgrading, so intercepting and capturing side can't copy the action of the information control lock unit 2 of key unit 1, can't open the remote control lock.
Adopt the AES cryptographic algorithm of 256 keys that the communication data of lock unit 2 and key unit 1 is encrypted, improved the fail safe and the reliability of cipher remote control lock.
Claims (2)
1. the cipher remote control lock control system based on the AES cryptographic algorithm comprises key unit (1) and lock unit (2), it is characterized in that,
Described key unit (1) is made up of timer A (1-8), keyboard (1-5) and continuous successively receiver A (1-1), decipher A (1-2), processor A (1-3), randomizer A (1-4), encryption equipment A (1-6) and transmitter A (1-7),
Described lock unit (2) is made up of with the transmitter B (2-1) that links to each other successively, encryption equipment B (2-2), randomizer B (2-3), processor B (2-4), decipher B (2-5), receiver B (2-6) timer B (2-7),
Described timer A (1-8) is connected with receiver A (1-1), decipher A (1-2), processor A (1-3), randomizer A (1-4) and transmitter A (1-7) respectively,
Described decipher A (1-2) is connected with randomizer A (1-4),
Described keyboard (1-5) is connected with transmitter A (1-7) with randomizer A (1-4) respectively,
Described timer B (2-7) is connected with transmitter B (2-1), processor B (2-4) and receiver B (2-6) respectively.
2. a method of utilizing the described control system of claim 1 to carry out the cipher remote control lock control is characterized in that, carries out according to the following steps:
Step 1: the randomizer A (1-4) of key unit (1) produces random number A
nA
n' B
n, this random number is encrypted through the AES of 256 keys cryptographic algorithm and is obtained ciphertext F
256(A
nA
n' B
n), then, this ciphertext is sent to lock unit (2);
Lock unit (2) was in initial wait state and produced one group of random number B by randomizer B (2-3) before the signal that receives key unit (1) transmission
nB
n' A
N-1
Step 2: lock unit (2) receives the ciphertext F that key unit (1) sends
256(A
nA
n' B
n), the deciphering flow process in the AES cryptographic algorithm of 256 of this ciphertext employings is decrypted, obtain expressly F
256 -1(A
nA
n' B
n); Afterwards,
The plaintext F that deciphering is obtained
256 -1(A
nA
n' B
n) and the described random number B of step 1
nB
n' A
N-1Compare, judge the B that comprises in two groups of numbers
nWhether equate, if
1) B
nUnequal, the randomizer B (2-3) of lock unit (2) produces random number B
N+1B
N+1' A
N-1, this random number is encrypted through 256 AES cryptographic algorithm, obtains ciphertext F
256(B
N+1B
N+1' A
N-1), and this ciphertext sent to key unit (1), simultaneously, lock unit (2) returns wait state, at this moment,
The ciphertext F that key unit (1) receives
256(B
N+1B
N+1' A
N-1), be unmatched signal, this time communication failure;
2) B
nEquate that the randomizer B (2-3) of lock unit (2) produces random number B
N+1B
N+1' A
n, this random number is encrypted through the AES of 256 keys cryptographic algorithm, obtains ciphertext F
256(B
N+1B
N+1' A
n), and this ciphertext sent to key unit (1), enter
Step 3: key unit (1) receives ciphertext F
256(B
N+1B
N+1' A
n), to of the deciphering flow process deciphering of this ciphertext, obtain expressly F with the AES cryptographic algorithm of 256 keys
256 -1(B
N+1B
N+1' A
n), then,
To receive ciphertext F
256(B
N+1B
N+1' A
n) and the described ciphertext F that sends of step 2
256(A
nA
n' B
n) between the time interval and the time of setting compare, if
1) this time interval surpasses the time of setting, then will plaintext F
256 -1(B
N+1B
N+1' A
n) directly send to randomizer A (1-4);
2) this time interval does not surpass the time of setting, and enters
Step 4: with the described initial plaintext A of step 1
nA
n' B
nThe plaintext F that obtains with the described deciphering of step 3
256 -1(B
N+1B
N+1' A
n) compare, judge the A in this two plaintext
nWhether equate, if,
1) A
nUnequal, randomizer A (1-4) produces random number A
N+1A
N+1' B
n, and this random number is transferred to keyboard (1-5), through keyboard (1-5) scanning, key unit (1) returns initial wait state;
2) A
nEquate that randomizer A (1-4) produces random number A
N+1A
N+1' B
N+1, this random number is encrypted through the AES of 256 keys cryptographic algorithm, obtains ciphertext F
256(A
N+1A
N+1' B
N+1), when this ciphertext was sent to lock unit (2), key unit (1) returned initial wait state;
Step 5: lock unit (2) receives ciphertext F
256(A
N+1A
N+1' B
N+1), the deciphering flow process deciphering of this ciphertext in the AES of 256 keys cryptographic algorithm obtains expressly F
256 -1(A
N+1A
N+1' B
N+1), then, to step 2 2) described in ciphertext F
256(B
N+1B
N+1' A
n) and receive ciphertext F
256(A
N+1A
N+1' B
N+1) between the time interval and the time of setting compare, if
1) this time interval surpasses the time of setting, and then lock unit (2) directly turns back to initial condition, waits for communication next time;
2) this time interval does not surpass the time of setting, and then enters
Step 6: to the described plaintext F of step 5
256 -1(A
N+1A
N+1' B
N+1) and ciphertext F
256(B
N+1B
N+1' A
n) compare, judge B
N+1Whether equate, if
1) B
N+1Unequal, then lock unit (2) turns back to initial wait state;
2) B
N+1Equate that lock unit (2) is carried out corresponding actions, afterwards, turns back to initial wait state.
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|---|---|---|---|
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|---|---|---|---|---|
| CN101424142B (en) * | 2008-12-01 | 2012-10-10 | 周晓明 | Lock, unlocking method thereof, lock administrative center and control method thereof |
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| CN104637117B (en) * | 2013-11-07 | 2017-06-30 | 国家电网公司 | Method, intelligent lock core, lockset and key that intelligent lock core and key are realized |
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| CN110047185B (en) * | 2019-04-25 | 2021-09-14 | 广州河东科技有限公司 | Unlocking method and system of intelligent door lock |
| CN110738778B (en) * | 2019-09-27 | 2021-11-09 | 北京小米移动软件有限公司 | Access control method and device, equipment and storage medium |
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| CN101265769A (en) | 2008-09-17 |
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