CN207033115U - The electronic lock of view-based access control model password principle - Google Patents

Abstract

The utility model discloses an electronic lock based on the principle of visual cipher, which comprises a lock body battery, a GSM slot back cover, a GSM module, a rear panel, a lock body, a door buckle box, an RFID card reader, a 51 single-chip microcomputer, an A/D Converter, demodulator, memory, buzzer, clock, keyboard, LCD screen, front panel, key carrier and passive readable and writable RFID tags; The fixed password improves the anti-cracking and anti-copying capabilities, and has low computational overhead, low requirements for hardware, and low cost.

Description

Electronic lock based on the principle of visual password

technical field

The utility model relates to an electronic lock, in particular to an electronic lock based on the principle of visual password.

Background technique

At present, there are roughly three types of mainstream electronic locks on the market: the first type needs to memorize the password and enter the password to complete the unlocking. This kind of lock is easy to be confused or forgotten, and once leaked or cracked, the user should not be aware of it, which is relatively safe. Low. The second type uses biometric technology to unlock the lock, such as fingerprints, iris, etc. Compared with the first type of combination lock, this type of lock is more secure, but there is a certain probability of identification failure, the cost is high, and it is impossible to let the non-entered biometric information Therefore, it is difficult to popularize, and family users seldom use this kind of lock. The third type uses radio frequency identification technology. This kind of lock has high security and moderate cost, but the simple password pairing unlocking technology is commonly used. Therefore, the information stored in all key tags is fixed and consistent, which is easy to be copied and cannot be realized. Identification of multiple users.

Utility model content

The purpose of this utility model is to provide an electronic lock based on the principle of visual cipher, which can control the unlocking and identify the identity of the user through the principle of visual cipher, thereby improving the security.

In order to achieve the above object, the technical solution of the utility model is:

An electronic lock based on the principle of visual cryptography, including lock body battery, GSM slot back cover, GSM module, rear panel, lock body, door buckle box, RFID card reader, 51 single-chip microcomputer, A/D converter, demodulator device, memory, buzzer, clock, keyboard, LCD screen, front panel, key carrier and passive readable and writable RFID tag; the lock body battery and GSM module are arranged on the rear panel and passed through the The GSM slot rear cover cover, the lock body is installed in the rear panel to form the main structure of the electronic lock; the door button box is arranged on the door frame, the door button box and the Corresponding to the lock body; described RFID card reader, A/D converter, demodulator, memory, buzzer, clock, keyboard and LCD screen are connected with described 51 single-chip microcomputers respectively, constitute hardware and circuit board structure, the hardware and circuit board structure are arranged on the lock body; the front panel is buckled on the rear panel and covered on the hardware and circuit board structure; the A passive readable and writable RFID tag is arranged on the key carrier to form a key structure, and the key structure is wirelessly connected to the RFID card reader through the passive readable and writable RFID tag.

The above-mentioned electronic lock based on the principle of visual password, wherein, the front face of the front panel is provided with an embedding groove, which is located on the upper part of the front panel, and the LCD screen is adapted to be embedded in the embedding. In the tank.

The above-mentioned electronic lock based on the principle of visual password, wherein, the front face of the front panel is provided with a plurality of sound through holes, which are located in the middle of the front panel, and the buzzer is located in the plurality of The inside of the sound hole.

In the above-mentioned electronic lock based on the principle of visual password, a handle is provided on the front panel, and the handle is connected to the lock body.

The above-mentioned electronic lock based on the principle of visual password, wherein, the rear panel is provided with a screw hole, which is located at the lower part of the rear panel, and the rear panel connects with the front panel through the screw hole through the screw hole. Panel fixed connection.

The above-mentioned electronic lock based on the principle of visual cipher, wherein, the said rear panel is provided with a hollow groove, which is located on the upper part of the said rear panel, and said lock body battery and GSM module are correspondingly arranged in said hollow part inside the groove.

In the above-mentioned electronic lock based on the principle of visual password, the said GSM slot rear cover is adapted to cover the hollow groove of the said rear panel.

The utility model uses the "one-time-one-pass" visual password to replace the traditional fixed password, improves the anti-cracking and anti-duplication capabilities, and has low calculation overhead, low requirements for hardware, and low cost.

Description of drawings

Fig. 1 is an exploded view of the electronic lock based on the visual password principle of the present utility model.

Fig. 2 is the usage flow diagram of the electronic lock based on the principle of visual password of the utility model.

detailed description

Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing.

Please refer to the accompanying drawing 1, an electronic lock based on the principle of visual password, including a lock body battery, a GSM slot back cover 1, a GSM module 2, a rear panel 3, a lock body 4, a door buckle box 5, and an RFID card reader device 6, 51 microcontroller 7, A/D converter 8, demodulator 9, memory 10, buzzer 11, clock 12, keyboard 13, LCD screen 14, front panel 15, key carrier 16 and passive readable Write RFID tag 17; described lock body battery and GSM module 2 are arranged on described rear panel 3 and pass through described GSM slot rear cover 1 cover, and described lock body 4 is installed in described rear Inside the panel 3, constitute the main structure of the electronic lock; the door button box 5 is arranged on the door frame, and the door button box 5 corresponds to the lock body 4; the RFID card reader 6, A/ D converter 8, demodulator 9, memory 10, buzzer 11, clock 12, keyboard 13 and LCD screen 14 are connected with described 51 single-chip microcomputers 7 respectively, constitute hardware and circuit board structure, described hardware and circuit The board structure is arranged on the lock body 4; the front panel 15 is buckled on the rear panel 3 and covered on the hardware and circuit board structure; the passive readable The writeable RFID tag 17 is arranged on the key carrier 16 to form a key structure, and the key structure is wirelessly connected to the RFID card reader 6 through the passive readable and writable RFID tag 17 .

The front end surface of the front panel 15 is provided with an embedding groove, which is located on the top of the front panel 15, and the LCD screen 14 is adapted to be embedded in the embedding groove, which is convenient for the LCD screen 14 display and use.

The front end face of the front panel 15 is provided with a plurality of sound through holes, which are located in the middle of the front panel 15, and the buzzer 11 is located inside the plurality of sound through holes, which can facilitate buzzing. The transmission of the sound of the buzzer 11.

The front panel 15 is provided with a handle, and the handle is connected with the lock body 4 to facilitate opening and closing of the lock body 4 .

The rear panel 3 is provided with screw holes located at the bottom of the rear panel 3, and the rear panel 3 is fixedly connected with the front panel 15 through the screw holes through the screw holes, which is convenient for disassembly and assembly.

The described rear panel 3 is provided with a hollow groove, which is located on the top of the described rear panel 3, and the lock body battery and the GSM module 2 are correspondingly arranged in the described hollow portion groove, which is convenient for installation, and the rear panel 3. It can better protect the battery of the lock body and the GSM module 2.

The GSM slot back cover 1 fits on the hollow groove of the back panel 3 to prevent the battery of the lock body and the GSM module 2 from falling out.

Please refer to the accompanying drawing 2, a method for using an electronic lock based on the principle of visual password, the method at least includes the following steps:

Step 1: Open the back cover 1 of the GSM slot and insert the lock body battery and SIM card.

Step 2: Electronic lock initialization.

Step 3: Key initialization.

Step 4: Unlock the lock.

Step 5: Check the unlock record.

In said step 2, the following sub-steps are also included:

Step 2.1: Enter the lock's initialized administrator password through the keyboard 13, which is stored in the memory 10.

Step 2.2: If the 51 single-chip microcomputer 7 makes a logical judgment and determines that the administrator password is correct, the user can perform the basic setting of the lock through the prompt information displayed on the LCD screen 14 and the keyboard 13 .

Step 2.3: The basic setting data of the lock is stored in the memory 10 .

In the described step 2.2, the basic setting of the lock includes the alarm SMS number and changing the administrator password.

In said step 3, the following sub-steps are also included:

Step 3.1: The user enters the correct administrator password through the keyboard 13, and selects the key initialization option according to the prompt on the LCD screen 14.

Step 3.2: Put the key carrier 16 close to the front panel 15, and then the user enters his or her four-digit personal password through the keyboard 13.

Step 3.3: 51 single-chip microcomputer 7 processes the password input by the user, and the user password image obtained, the user password image is decomposed into two visual password images, one visual password image is written in the memory 10 of the hardware and circuit board structure, and the other visual password image The image is sent to the RFID card reader 6, and is written into the passive readable and writable RFID tag 17 of the key structure by the RFID card reader 6.

In the step 3.2, in order to distinguish different user identities, it is required that the personal passwords of each key are different.

In said step 4, the following sub-steps are also included:

Step 4.1: When the user unlocks the lock with his own key, he only needs to put the key carrier 16 close to the front panel 15 .

Step 4.2: The RFID reader 6 in the lock body 4 hands the information in the passive readable and writable RFID tag 17 that reads the key structure to the 51 single-chip microcomputer 7 for processing.

Step 4.3: 51 the single-chip microcomputer 7 reads the information in the memory 10 to make a logical judgment. If user's identity is legal, 51 single-chip microcomputers 7 send unlocking control signal to lock body 4 and record user's identity and the time of unlocking in memory 10;

Step 4.4: After each unlock, the electronic lock will randomly generate two new visual password images to replace the original visual password images according to the user password image.

In said step 5, the following sub-steps are also included:

Step 5.1: After the user enters the correct administrator password through the keyboard 13, the LCD screen 14 prompts the user to enter the option of viewing unlock records on the keyboard 13.

Step 5.2: Check the unlock record of each key on the LCD screen 14 .

The software design of the utility model adopts the principle of visual password to realize unlocking control and identification, and the RFID reader 6 sends out a radio frequency signal of a certain frequency through the antenna. When the passive readable and writable RFID tag 17 in the key structure enters the effective reading range of the RFID reader 6, its antenna will generate an induced current, so that the passive readable and writable RFID tag 17 obtains energy and is activated and sends The RFID reader-writer 6 sends out visual password information. The RFID reader-writer 6 receives the carrier signal from the tag, demodulates and decodes the received signal and sends it to the 51 single-chip microcomputer 7 for processing. 51 single-chip microcomputer 7 judges the legitimacy of this key structure according to logic operation. If it is a legal key, unlock and record the unlocking information, and write new visual password information by the RFID reader 6; if it is an illegal key, trigger the GSM module 2 to report to the police.

When a new user uses for the first time, a digital secret key is set, which is stored in the memory 10 of the lock in the form of a binary map K after being processed by 51 single-chip microcomputers 7 . 51 Single-chip microcomputer 7 processes the binary image K to generate two binary images K1 and K2, K1 and K2 need to be superimposed (bitwise AND operation) to obtain K, store K1 in the memory of the lock, and store K2 in in the key. Every time the lock is unlocked, the K2 in the key and all the K1 in the memory are sequentially superimposed, and the superposition result is compared with the K corresponding to K1 in the memory 10. If the superposition result is the same as the K corresponding to K1, the lock is unlocked and After identifying the user's identity according to K, record the unlock record; otherwise, the lock cannot be unlocked and the alarm will be called. After each unlock, the electronic lock will randomly generate a new binary map K1 and K2 to replace the original binary map according to K.

If the user's legal key is copied, there may be two situations: Case 1, the user unlocks the lock before the copied key is used, since a new binary image will be generated every time the legal user unlocks the lock, then the copied key is directly invalidated; Case 2 , the copy key is unlocked before the user's legal key, then an alarm will be triggered when the user unlocks the lock, and the user can also detect that the key has been copied in the shortest time and take remedial measures to make the copy key invalid. In addition, because each user has a different personal password, the identity of the user can be identified and recorded every time the lock is unlocked, which is convenient for the user's operation tracking. Therefore, the electronic lock has higher security than general electronic locks and can realize the user identification function.

In summary, the utility model uses a "one-time pad" visual password to replace the traditional fixed password, which improves the anti-cracking and anti-copying capabilities, and has low computational overhead, low hardware requirements, and low cost.

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structural transformation made by the contents of the specification of the utility model, or direct or indirect use of the technical fields attached to other related products , are all included in the scope of patent protection of the utility model in the same way.

Claims (7)

1. A kind of 1. electronic lock of view-based access control model password principle, it is characterised in that：Including lock body battery, GSM slots bonnet, GSM moulds Block, rear board, lock body, knocker box, RFID card reader, 51 single-chip microcomputers, A/D converter, demodulator, memory, buzzer, when Clock, keyboard, LCD screen, front panel, key carrier and passive readable writable rfid tag；Described lock body battery and gsm module are set Put on described rear board and be arranged on by housing lid after described GSM slots, described lock body in described rear board, Form electronic lock agent structure；Described knocker box is arranged on doorframe, and described knocker box is corresponding with described lock body；Institute RFID card reader, A/D converter, demodulator, memory, buzzer, clock, keyboard and the LCD screen stated are respectively with described 51 Single-chip microcomputer is connected, and forms hardware and board structure of circuit, and described hardware and board structure of circuit are arranged on described lock body；It is described Front panel be buckled on described rear board, and cover and cover on described hardware and board structure of circuit；It is described it is passive it is readable can Write RFID label tag to be arranged on described key carrier, form key structure, described key structure by it is described it is passive can Read writable rfid tag and described RFID card reader wireless connection.
2. 2. the electronic lock of view-based access control model password principle according to claim 1, it is characterised in that：Before described front panel End face is provided with embedding slot, and positioned at the top of described front panel, described LCD screen adaptation is inlaid in described embedding slot.
3. 3. the electronic lock of view-based access control model password principle according to claim 1, it is characterised in that：Before described front panel End face is provided with multiple sound through holes, and positioned at the middle part of described front panel, described buzzer is located at described multiple sound The inner side of through hole.
4. 4. the electronic lock of view-based access control model password principle according to claim 1, it is characterised in that：Set on described front panel There is handle, described handle is connected with described lock body.
5. 5. the electronic lock of view-based access control model password principle according to claim 1, it is characterised in that：Set on described rear board Have screw hole, positioned at the bottom of described rear board, described rear board by screw pass through described screw hole with it is described before Panel is fixedly connected.
6. 6. the electronic lock of view-based access control model password principle according to claim 1, it is characterised in that：Set on described rear board There is hollow out groove, positioned at the top of described rear board, described lock body battery and gsm module are correspondingly arranged at described hollow out In portion's groove.
7. 7. the electronic lock of view-based access control model password principle according to claim 6, it is characterised in that：After described GSM slots Lid adapter cover is covered on the hollow out groove of described rear board.