Intelligent door locks are based on different components and involve different encryption technologies. Here, we will briefly talk about the types of encryption technologies used, such as the front and rear panels, the types of encryption technologies identified and the encryption of information transmission.

　　Compared with the traditional mechanical door lock, its unlocking method is more intelligent and convenient, and it can realize remote unlocking, password unlocking, fingerprint identification and other unlocking methods. However, because the smart door lock involves personal privacy and security issues, it must adopt high-intensity encryption technology to ensure security. This article will introduce you to.

　　Introduction of encryption technology commonly used in front and rear panel communication of intelligent door lock.

　　01. Symmetric encryption technology

　　Symmetric encryption technology refers to encryption technology that uses the same key for encryption and decryption, also known as shared key encryption technology. In the intelligent door lock, it is a common way to adopt symmetric encryption technology. For example, when the user unlocks the lock through the remote mobile phone APP, the APP will encrypt the instruction input by the user and then send it to the smart door lock. After receiving the instruction, the door lock will decrypt it with the same key to realize the unlocking function. The advantage of symmetric encryption technology is fast encryption and decryption, but its disadvantage is that the key must be shared between the user and the door lock. If the key is leaked, the security of the door lock will be threatened. Commonly used include AES, DES, RC5 and RC6.

　　02. Asymmetric encryption technology

　　Asymmetric encryption technology refers to encryption technology that uses different keys for encryption and decryption, also known as public key encryption technology. In smart door locks, asymmetric encryption technology is mainly used for user authentication and information transmission security. For example, when the user unlocks the lock by fingerprint or password, the smart door lock will encrypt the information input by the user, encrypt it with the public key of the door lock, and then send it to the door lock, and the door lock will decrypt it with its own private key. The advantage of asymmetric encryption technology is that the key does not need to be shared and the security is higher, but its disadvantage is that the encryption and decryption speed is slow. RSA encryption is commonly used.

　　03.Hash algorithm

　　Hash algorithm is an encryption algorithm that compresses messages of any length into a fixed-length digest. In smart door locks, Hash algorithm is mainly used to prevent data tampering and verify data integrity. For example, when the smart door lock receives the instruction input by the user, it will use the Hash algorithm to process the instruction, generate a fixed-length summary information, and store the summary information with the instruction. When the smart door lock receives the instruction again, it will use the same Hash algorithm to generate a new summary information, and compare the new summary information with the previously stored summary information to verify the integrity and authenticity of the data. The advantage of Hash algorithm is that it can compress data of any length into a fixed-length summary information, which can effectively prevent data tampering, but its disadvantage is that the summary information cannot be restored to the original data, so it is not suitable for encryption and decryption.

　　04. Compare the advantages and disadvantages of the above three technologies.

　　All the encryption technologies mentioned above can be used to encrypt the communication between the front and rear panels of the smart door lock. Different encryption technologies have their own advantages and applicable scenarios, which can be selected according to the actual situation.

　　Symmetric encryption technology has the advantages of high speed and high encryption and decryption efficiency, and is suitable for scenes with large data volume and high real-time requirements, such as real-time control of door locks and data transmission. However, the key management of symmetric encryption technology is complicated, and if the key is leaked, the security of encrypted data will be threatened.

　　Asymmetric encryption technology has the advantages of simple key management and high security, and is suitable for scenes with high security requirements, such as security authentication and remote control of door locks. However, the speed of asymmetric encryption technology is slow and the efficiency of encryption and decryption is low, so it is not suitable for scenes with large amount of data and high real-time requirements.

　　The advantage of Hash algorithm is that it can compress any length of data into a fixed length of summary information, which can effectively prevent data tampering, and is suitable for data integrity verification and data tampering prevention scenarios. However, the disadvantage of Hash algorithm is that the abstract information cannot be restored to the original data, so it is not suitable for encryption and decryption.

　　05. Sum up a sentence

　　For the local communication encryption of smart door locks, we can choose the appropriate encryption technology according to the actual situation, and comprehensively consider the requirements of security, real-time, efficiency and convenience.