KR200289401Y1 - Electronic key system using interactive authentication - Google Patents

Abstract

The present invention relates to an electronic key system for performing the opening and locking of the electronic lock device for restricting access and use. When controlling the opening and locking of the electronic lock using a pre-registered electronic key, the electronic lock device and the electronic key perform a procedure for authenticating by encrypted data interacting with each other to prevent illegal opening attempts and to copy It prevents the authentication of electronic keys and makes them useless, and it is designed the electronic key system which is easy to use, and has excellent security and reliability.

Description

Electronic key system using interactive authentication

In the case of a conventional electronic key system, a method of inputting a pre-registered password using a number key of '0' to '9' as a means for performing opening and locking, a password or a unique ID to a nonvolatile memory (EEPROM). , Flash memory, etc.) and stored them in the built-in electronic key, and applied them to the electronic lock device, or remotely controlled using an RF transmitter with a password or a unique ID. However, the method using the numeric keys has a high risk of exposing a password to a third party, and has a disadvantage in that it is relatively inconvenient in use and security, such as having to change the password frequently. In addition, in the method using the electronic memory and the method using the RF to improve security, by using a plurality of IDs and prototyping encryption, the ID can be changed irregularly every time the electronic key is used so that the ID cannot be guessed. A method of preventing the opening of illegal e-locks was used. However, this method also prevents permanent copying, but there was a problem in preventing illegal copying of temporary electronic keys. In other words, even if the ID is changed every time it is encrypted and used, the ID used for the next open is always stored in the memory of the electronic key, so if you simply copy it, you can use the electronic key again until the ID is changed again. There has been a problem that illegal use is enabled by the electronic key copied to. For example, in the case of entrusting a car key for a parking service at a restaurant, the key of the door lock is often with the car key. Therefore, simply copy the electronic key of the door lock and check the address on the car registration card. It is likely to occur.

Therefore, the present invention is intended to solve these problems. There is no conventional method for determining the validity of a copying of an electronic key from an electronic lock device by using an ID code, which encrypts the electronic lock device unilaterally and stores it in the memory of the electronic key. In the present invention, the opening and locking of the electronic lock is controlled by authenticating the legitimacy using the encrypted encryption ID instead of authenticating the electronic lock and the electronic key by using the encrypted data. Therefore, the illegally copied electronic key is characterized by invalidating the copied electronic key by not being able to authenticate itself to the electronic log.

1 is a diagram showing the configuration of an electronic key.

2 is a schematic diagram of the configuration of the electronic lock.

3 is a flow chart of a software method of electronic key function.

4 is a flow chart of the software method of the function of the electronic record.

Brief description of the main parts

100: switch 1 input 101: switch 2 input

102: microcomputer 103: memory

104: encryption device 105: shift register

106: I / O connector 107: LED driver

108: LED display unit

200: DC motor 201: motor drive unit

202: buzzer or speaker 203: buzzer amplifier

204: LED display unit 205: memory

206: decoding device 207: random number generator

208: shift register 209: I / O connection device

210: Microcomputer 211: Clock Feeder

212: program memory 213: open switch input

214: lock switch input

The present invention will be described in detail with reference to the accompanying drawings. Describing the configuration of the electronic key of the present invention, the switch input 100 for instructing the opening and the lock, the switch input 101 for using the opening and the lock separately, and the microcomputer 102 performing the main function of the electronic key. A memory 103 for storing serial numbers and encryption key values, an encryptor 104 for performing encryption, a shift register 105 for converting data to serial, an input / output connecting device 106, and an LED for driving 107; It consists of LED 108 for status display. However, the above configuration is a diagram of the function of the electronic key, and in practice, (103), (104), and (105) are generally implemented by software inside the microcomputer. Looking at the configuration of the electronic lock, the DC motor 200 which generates the mechanical motion of the opening and locking of the lock device, the H bridge driver 201 driving the stationary area of the motor, the buzzer or the speaker which shows the state of the electronic lock as sound. 202, an amplifier 203 for driving the buzzer, an LED 204 for indicating an operation state, a memory 205 for storing a serial number of a registered electronic key and an encryption key value necessary for decrypting encrypted data, and decoding Decoder 206 to perform, random number generator 207, shift register 208 to convert serial and parallel of data, input / output connecting device 209, microcomputer 210 to perform main functions of electronic lock, and clock of microcomputer It consists of a clock generator 211 for supplying the memory, a memory 212 for storing the program of the microcomputer, and switches (213, 214) for indicating the opening and locking therein. However, the above configuration is a diagram of the function of the electronic lock, and in practice, (205), (206), (207), and (208) are generally implemented by software inside the microcomputer. In addition, the input / output connection device 106 can be variously used in a number of ways. First, a method in which an electronic key and an electronic lock are directly contacted by electrical contacts. In this case, the contact can be used by separating the transmission and the reception by two signal lines, or it can be used as one contact by half duplex by sharing transmission and reception on one signal line. Secondly, it is possible to connect non-contact by constructing transmitter and receiver using optical elements such as infrared and IrDA. Third, it can be used by connecting remotely using a transceiver using RF. In the case of a contact type using an electrical contact, the switch input 100 may be omitted by automatically detecting contact. The principle of operation will be described in detail with reference to the accompanying drawings according to the flow of signals. If the user who wants to control the opening and locking of the electronic lock is in the non-contact type, presses the switch 100 of the electronic key or contacts the electronic key and the electronic lock in the case of the contact type, the microcomputer 102 detects the state of the switch 100. In this case, the electronic key and the electronic lock are detected. At this time, the microcomputer 102 sends the serial number of the electronic key stored in the memory 103 and the encryption key value used for encryption to the encryptor 104 to instruct the encryption. When the encryption is completed, the encrypted data is serially converted through the shift register 105 and serially sent to the input / output connecting device 106. The input / output connection device 106 transfers data to the electronic lock by the various input / output connection methods listed above. The electronic lock input / output connecting device 209 sends data sent from the electronic key to the shift register 208 to convert the data in parallel. At this time, the microcomputer 210 of the electronic lock reads the data sent from the electronic key and the encryption key value necessary for decryption stored in the memory 205, and sends the decryption data to the decoder 206 to decrypt the encrypted data. After the decoding process, the microcomputer 210 reads and compares the decoded data and the serial number stored in the memory to determine whether the electronic key is registered in advance. If it does not match, it is not recognized as a registered electronic key, so a buzzer 202 generates a sound indicating that it is not a registered electronic key, and ends the operation, and enters a waiting state waiting for input of the next new electronic key. However, if the comparison result is matched, it is recognized as a pre-registered electronic key, and the following series of operations are performed to determine whether the electronic key is copied or not. First, a random number is generated through the random number generator 207, and the generated random number is serially converted through the shift register 208 and serially sent to the input / output connector 209, and the input / output connector 209 is made above. The random number data is sent to the electronic key and the electronic key is required to encrypt and retransmit the received random number. At this time, the electronic key receives the data sent from the electronic lock through the input / output connection device 106 and converts the data in parallel through the shift register 105. The microcomputer 102 of the electronic key sends the random number sent from the electronic lock and the encryption key stored in the memory 103 to the encryptor 104 to instruct to encrypt again. When the encryption process is completed, the shift register 105 ) Is converted to serial, and then data is transmitted to the electronic lock through the input / output connection device 106. At this time, the electronic lock repeats the process of receiving data as in the beginning. That is, the input / output connecting device 209 sends the data sent from the electronic key to the shift register 208 and converts the data in parallel. The microcomputer 210 of the electronic record reads the data sent from the electronic key and the encryption key value necessary for decryption stored in the memory 205 and sends the decryption data to the decoder 206 to instruct decryption of the encrypted data. After the decoding process, the microcomputer 210 compares whether the decoded data is the same as the random number sent to the electronic key. If it does not match, it is not recognized as a normal electronic key, so the buzzer 202 generates a sound indicating that it is not a normal electronic key, terminates work, and enters a waiting state for waiting for input of the next new electronic key. However, if the comparison result is matched with the pre-registered normal electronic key, the H. breach driver 201 commands forward or reverse rotation, and the microcomputer 210 recognizes the normal electronic key through the buzzer 202. Output The H. breach driver 201 drives the motor in a forward rotation or a reverse rotation by the command of the microcomputer 210 so that the motor 200 is rotated so that locking and opening are performed. As such, the electronic key and the electronic lock authenticate each other by exchanging data with each other, but the copied electronic key cannot be authenticated by the electronic lock because it cannot generate normal encrypted data for random random numbers. will be.

3) The function performed in the electronic key is illustrated by a software procedure.

4) The function performed in the electronic lock is illustrated by a software prochart.

As described above, the electronic lock and electronic key produced by the present invention have no risk of password exposure caused by the electronic lock using the conventional numeric keys, and are caused by the encryption of the ID using the conventional electronic memory. There is no risk of copying and there is no need to use N keys for N locks like a lock device that uses mechanical keys. Opening and locking can be performed by carrying a single electronic key in all places where the electronic lock device, such as a drawer, is used. Even if you lose your electronic key, if you purchase and register a new electronic key without having to replace the electronic lock device, you can use it with confidence because the old electronic key is automatically disabled. In addition, due to the development of semiconductor manufacturing technology, it is possible to construct an electronic key system which is very economical, has excellent security, and is reliable.

Claims (3)

In an electronic key system for opening and locking an electronic lock device for restricting access and restriction of use, a memory 103 for storing a serial number and an encryption key value used for encryption, an encryptor 104 for performing an encryption function, and a note A memory 205 for storing an electronic key, an encryption key value required for decryption, and a serial number of a pre-registered electronic key, comprising a microcomputer 102 and an input / output device 106 for controlling a function, and performing a decryption function. Electronic key system consisting of an electronic lock device, characterized in that consisting of a decoder 206, a random number generator 207, a microcomputer 210 and an input / output device 209 for controlling the main function The electronic key and memory 205, the decoder 206, and the random number generator 207 according to claim 1, wherein the memory 103, the encryptor 104, and the shift register 105 are implemented by software of Micom. And electronic register system consisting of an electronic lock device, characterized in that the shift register 208 is implemented by the software of the microcomputer According to claim 1, the input and output devices 106, 209 is configured to perform a two-way authentication by simultaneously configuring the transmitter and the receiver in the contact method by the electrical contact, the non-contact method using infrared or IrDA, and the remote control using RF. Electronic Key System