CN102121335B

CN102121335B - Bluetooth electronic lock system based on random number unlocking

Info

Publication number: CN102121335B
Application number: CN201110053293A
Authority: CN
Inventors: 陆起涌; 张群; 杨絮; 贾思强
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2011-03-07
Filing date: 2011-03-07
Publication date: 2012-10-17
Anticipated expiration: 2031-03-07
Also published as: CN102121335A

Abstract

The invention belongs to the technical field of electronic locks, and particularly relates to a bluetooth electronic lock system based on random number unlocking. The system is separated into a key part and a lock part, wherein the key is an intelligent mobile phone with a bluetooth function; the lock comprises power supply conversion, a singlechip, a bluetooth transceiver module, a liquid crystal display (LCD), a general packet radio service (GPRS) module and an electronic lock; the key end and the lock end are communicated and transmit unlocking data through bluetooth; and data transmitted between the lock and the key are random numbers generated at the lock end. Compared with the conventional bluetooth electronic lock system, through the random number generated at the lock end and characteristic that the random number is only used once, difficulty and cost for illegal unlocking are increased. The random number is generated at the lock end, so that a user can acquire and save the random number by a safe mode for use next time; and when the mobile phone is lost or stolen, or encounters other situations, the user can communicate with the lock through the GPRS module to cancel the primary unlocking random number and generate and acquire a new random number. The system has the characteristics of simpleness and safety.

Description

A kind of Bluetooth electronic lock system of unblanking based on random number

Technical field

The invention belongs to the electronic lock technical field, be specifically related to a kind of electronic lock system of unblanking based on random number.

Background technology

At present common electronic lock control system is received extraneous frequency interferences big but the data of transmission are easy by intercepting generally through the wireless transmission control signal, and safety is not high.The Bluetooth electronic lock system that occurs on the market; Basically be two kinds of situation: the 1st, utilize Bluetooth communication to transmit the data of unblanking; Because bluetooth all is disclosed to all bluetooth equipments, and the Bluetooth transmission data can be by other communication equipment intercepting, this security of system is not high; The 2nd, some Bluetooth electronics lock is in order to improve safety, encrypts or adds too much hardware controls through complicacy, and this causes system architecture complicated, and cost is high.The bluetooth module that native system is held through mobile phone and lock carries out Bluetooth communication; The bluetooth module of lock end is worked as wireless serial and is used, and proposes a kind of new verification method of unblanking, under the situation that improves security of system greatly; And system architecture is simple; Cost is low, and practicality is high, is applicable in the small-sized door-locking system.

Summary of the invention

The object of the present invention is to provide the Bluetooth electronic lock system that a kind of safety is good, simple in structure, cost is low.

Bluetooth electronic lock system of unblanking based on random number provided by the invention, it comprises blue-tooth intelligence mobile phone, single-chip microcomputer, bluetooth module, GPRS module, LCD Liquid Crystal Module, electric lockset, power supply conversion.Wherein the blue-tooth intelligence mobile phone constitutes the key end of electronic lock system.Peripheral components such as single-chip microcomputer, bluetooth module, GPRS module, LCD Liquid Crystal Module, electric lockset, power supply conversion constitute the lock end of electronic lock system.Key end communicates through bluetooth with the lock end, sends the data of unblanking.Wherein:

Key end, through establishment blue-tooth intelligence handset program, the user imports the data of correct unlatching lock, and the data that will unblank of blue-tooth intelligence mobile phone send to the lock end through bluetooth then;

Lock end, SCM program are realized receiving the data that the lock end sends through bluetooth module, and verify, if through checking then unblank, otherwise do not open and record;

The data of transmitting between the lock & key are the random numbers that produced through certain rule by the lock end; When unblanking at every turn; The bluetooth module of lock end receives the data that mobile phone sends; Single-chip microcomputer compares the random number that can unblank specifically of preserving in these data and the single-chip microcomputer, the control signal of unblanking with generation; Random number is relevant with lock with key, and lock can be preserved these data, and informs key through certain mode, and key only can use when unblanking next time, and once effective, and lock will regenerate at random

Number.

After unblanking to finish, the lock end produces the random number of unblanking next time at every turn, and the user can or read the LCD module and obtain this random number of unblanking through Bluetooth communication, GPRS communication.The lock end is realized auto-unlocking through peripheral circuit.

Compare with traditional electronic lock system, the safety that the random number that this Bluetooth electronic lock control system produces through the lock end has improved lock through the short-range communication characteristics of bluetooth module, has avoided data to be stolen through wireless signal.Compare with Bluetooth electronic lock system in the past, random number and the only expendable characteristics of this random number through the lock end produces have increased the difficulty and the cost of illegally unblanking.Random number is produced by the lock end, and the user obtains with secured fashion and preserves so that use next time; In case situation such as take place that lost mobile phone is stolen, the user can get in touch through GPRS module and lock, cancels former random number of unblanking, and generation and obtain new random number.This system has simple, safe characteristic.

Main feature of the present invention:

The key that

Figure 2011100532936100002DEST_PATH_IMAGE001

unblanks at every turn is all different; Be the random number that produces certain-length according to certain rule, the no one knows in advance;

random number is produced by the lock end; Select to obtain by the user with the mode of safety; And once come into force, end the lock back and cancel;

Figure 2011100532936100002DEST_PATH_IMAGE003

attacked for key loss or hand-set from stolen and lock, through GPRS module controls security of system with regain key.

Description of drawings

Fig. 1, the Bluetooth electronic lock system schematic of unblanking based on random number.

Fig. 2, the Bluetooth electronic lock system key end structure block diagram of unblanking based on random number.

Fig. 3, the Bluetooth electronic lock system lock end structure block diagram of unblanking based on random number.

Fig. 4, the Bluetooth electronic lock systems soft ware process chart of unblanking based on random number.

Label among the figure: 1 is the blue-tooth intelligence mobile phone, and 2 is single-chip microcomputer, and 3 is bluetooth module, and 4 is the GPRS module, and 5 is the LCD Liquid Crystal Module, and 6 is electric lockset.

The specific embodiment

Introduce the specific embodiment below in conjunction with figure:

The Bluetooth electronic lock system of unblanking based on random number is made up of key and lock two parts.Key intercoms through bluetooth module with lock mutually.The structured flowchart of system is as shown in Figure 1.

Key end realizes the serial ports sending function through on mobile phone, programming, and connects, and breaks off connecting, and the baud rate setting is sent data format and selected transmission and transmission and received content interface displayed.The control interface is as shown in Figure 2.

The lock end is made up of Cygnal series monolithic, relay, LED, GPRS module, LCD LCD, power supply conversion and electric lockset etc.Single-chip microcomputer operation kernel program, carry out processing, random number to the data of unblanking produce, to operations such as the control of GPRS module, LCD liquid crystal display displays; Relay links to each other with the electronic lock system interface, through relay electric lockset is specifically controlled, and relay is driven by amplifying circuit; LED is used to indicate the duty of current bluetooth module; The power supply conversion is used to satisfy the demands of different of different chip voltages.Lock end structure block diagram is as shown in Figure 3.

Based on the Bluetooth electronic lock system that random number is unblanked, concrete implementation is following:

1, system is carried out initialization, start the work of lock end.

The key of 2, at every turn unblanking is all different, and this key is by the random number of the single-chip microcomputer of locking end according to the certain-length of certain rule generation, can increase random number length and improve security of system.The user is after ending once lock, and the random number that the lock end will be unblanked last time is cancelled, and regenerates the key of unblanking next time, if the random number that produces and repetition is arranged before regenerates, shows through LCD.

3, after the user gets into, can be through Bluetooth communication, GPRS module communication, read three kinds of modes of LCD and obtain the random number of unblanking next time, the user can be according to safety and the convenient obtain manner of selecting.

If 4 user loss or forget the key of unblanking are informed lock end GPRS module through short message, obtain the key of unblanking.If mobile phone is lost or is stolen, let the lock end cancel the random number in the lost mobile phone through the GPRS module, regenerate the random number of unblanking, inform the user through the GPRS module.

5, for some disabled users behind the PIN code that cracks lock end bluetooth module; Trial is unblanked or is attacked when locking; Surpass 3 times in the continuous frequency of failure,, inform the user through the GPRS module by the work of single-chip microcomputer lock stop end bluetooth module; In this case, when unblanking next time, starting the work of lock end bluetooth module through the GPRS module earlier communicates by letter again.The software flow pattern of system is as shown in Figure 4.

Native system is through realizing above function, the safety that has improved system greatly.

Claims

1. a Bluetooth electronic lock system of unblanking based on random number is characterized in that it comprises blue-tooth intelligence mobile phone, single-chip microcomputer, bluetooth module, GPRS module, LCD Liquid Crystal Module, electric lockset, power supply conversion; Wherein the blue-tooth intelligence mobile phone constitutes the key end of electronic lock system, and single-chip microcomputer, bluetooth module, GPRS module, LCD Liquid Crystal Module, electric lockset, power supply conversion constitute the lock end of electronic lock system; Key end communicates through bluetooth with the lock end, sends the data of unblanking; Wherein:

The data of transmitting between the lock & key are the random numbers that produced through certain rule by the lock end; When unblanking at every turn; The bluetooth module of lock end receives the data that the blue-tooth intelligence mobile phone sends; Single-chip microcomputer compares the random number that can unblank specifically of preserving in these data and the single-chip microcomputer, the control signal of unblanking with generation; Random number is relevant with lock with key, and lock is preserved these data, and informs key through certain mode, and key only can use when unblanking next time, and once effective, and lock will regenerate random number.

2. Bluetooth electronic lock system of unblanking according to claim 1 based on random number, after the end that it is characterized in that at every turn unblanking, the lock end produces the random number of unblanking next time, and the user communicates by letter through Bluetooth communication, GPRS or reads the LCD module and obtain this random number of unblanking; The lock end is realized auto-unlocking through peripheral circuit.