Engine anti-theft authentication method and device of engine anti-theft system

Abstract

The invention provides an engine anti-theft authentication method. Engine anti-theft authentication comprises key authentication and engine controller authentication. Engine controller authentication comprises the following steps that an engine management module generates a set of random numbers and transmits the numbers to an intelligent access key-free starting module through a vehicle body controller communication gateway; the intelligent access key-free starting module carries out encryption calculation through an XTEA algorithm according to a fixed code stored in the intelligent access key-free starting module, a secret key and the received random numbers, replaces part of digits in the calculation result with the key authentication result to generate second data, and transmits the second data back to the engine management module through the vehicle body controller communication gateway; the engine management module compares the key authentication result pre-stored in the engine management module and first data generated through the XTEA algorithm with the fed back second data, permits the engine to start if the data are matched, otherwise forbids starting. The invention further provides an engine anti-theft authentication device. The engine anti-theft authentication method and device adopt the XTEA algorithm, and are small in occupied space and short in calculation time.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an engine anti-theft authentication method and device using XTEA (eXtended Tiny Encryption Algorithm, extended micro encryption algorithm). Background technique [0002] The engine anti-theft system is composed of FOB (smart key module), PEPS (Passive Entry and Passive Start, intelligent entry keyless start module) and EMS (Engine Management System, engine management module). The password authentication of the engine anti-theft system includes key authentication and engine controller authentication, the key authentication completes the authentication between the smart key module and the smart entry keyless start module, and the engine controller authentication completes the smart entry keyless entry module and the engine management module authentication between. [0003] The key authentication is handled by a special chip, the smart key is provided with a transponder, the transponder ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems that the encryption algorithm code used in the engine anti-theft authentication method in the prior art is relatively long, takes up a large storage space, and takes a relatively long calculation time, the present invention provides a novel engine anti-theft authentication method for an engine anti-theft system

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