Authentication method and system for engine immobilizer unit

Abstract

The invention relates to the automobile safety field, in particular to an authentication method and a system of an engine anti-theft unit. The method comprises the following steps: detecting whether an ignition signal of an ignition lock is received; If yes, calculating a current first ignition number according to the ignition signal; Combining a vehicle VIN code and a random number according to the first ignition number to obtain plaintext to be encrypted; Carrying out irreversible encryption operation on the plaintext to obtain authentication data; Sending the authentication data to an engine control unit so that the engine control unit compares the authentication data with the encrypted data after obtaining the encrypted data according to the ignition signal, the vehicle VIN code and the random number, and controls the engine to start and run if the authentication data and the encrypted data coincide. the vehicle anti-theft safety level is improved.

Description

technical field [0001] The invention relates to the field of automobile safety, in particular to an authentication method and system for an engine anti-theft unit. Background technique [0002] With the rapid growth of car ownership, cases of car theft have occurred from time to time across the country; according to statistics from China Insurance, 4,255 motor vehicles were stolen across the country in 2016. The car anti-theft device has been developed from an early mechanical type to an electronic anti-theft device; the engine anti-theft system mainly controls the starting and running of the engine, and thus achieves the purpose of anti-theft. [0003] The engine anti-theft system can be roughly divided into two processes of authentication and authentication to realize the anti-theft of the engine system; authentication means that the engine anti-theft unit identifies the identity of the user, and authentication means that the engine Authentication and authentication are c...

AI Technical Summary

Problems solved by technology

[0008] However, the encryption algorithms mentioned above are usually conventional encryption algorithms or encryption algorithms customized by vehicle manufacturers, and they are characterized by using keys for encryption; but these encryption algorithms are public or easy to obtain

Therefore, the confidentiality of the above encryption method lies in the confidentiality of the key; and the use of the key for data encryption has the problem of key storage and distribution. Once the key is leaked and stolen, the encryption in the authentication process will be destroyed. to crack

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