Wireless car key encryption method and device, wireless car key decryption method and device and wireless car key encryption and decryption system

Abstract

The invention provides a wireless car key encryption method and device, a wireless car key decryption method and device and a wireless car key encryption and decryption system. To-be-sent information is encrypted by taking a random number generated according to a current random number seed as an encryption key, so the difficulty of breaking the encryption key is improved. Moreover, authentication information uniquely corresponding to the random number is generated through utilization of a non-copyable characteristic of a physically non-clonable function in a wireless car key, the problem that the security is invalid due to the fact that the encryption key preset in the wireless car key cannot be read and copied to another blank wireless car key of which hardware architecture is the same to that of the wireless car key is solved, the security of the encryption key is further improved, and the probability that a car is stolen is reduced.

Description

technical field [0001] The present invention relates to the technical field of automobile electronics, and more specifically, relates to an encryption and decryption method, device and system for a wireless automobile key. Background technique [0002] Along with the raising of people's living standard, automobile has gradually become the means of transportation commonly used in people's daily life. In order to facilitate the user to control the car, the car key has gradually developed from a remote key that can be used to switch car locks with remote buttons to a smart wireless car key that can be carried around to open and close the car door and start the engine. [0003] In order to ensure the security and confidentiality of the communication between the wireless car key and the car, the key preset in the wireless car key is usually used to encrypt all the communication data to be transmitted, and together with the identity authentication protocol information Wireless tr...

AI Technical Summary

Problems solved by technology

However, although the encryption and decryption method of the existing wireless car key can prevent the communication data from being known by the attacker, in some environments where the hardware of the wireless car key itself can be obtained, such as auto repair and auto parts shops, car wash shops, and driver's agents Parking, etc., the wireless car key is still easy to be read and all the software programs in it are copied to another blank wireless car key with the same hardware structure, and the security of the car key will be reduced due to the existing encryption algorithm being cracked or the key being copied. Fail, increasing the risk of car theft

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