Research And Implementation Of Anti-theft Method Of Information Based On CANFD Bus

With the rapid development of automotive electronics,intelligent network and other modern vehicle engineering technology,various new buses are used more and more in modern automobiles.However,all kinds of new buses do not consider how to deal with the destructive information security threat in designing,and the bus protocol has the vulnerability at the level of information security.Based on CANFD bus,we build a model of theft and deception attack,and design a software level information encryption method for attack model,which realizes CANFD bus’ s defense against stealing attack.The main work done in this paper is as follows:1.In the continuous development of the automotive network background,analyzes the classification of information security threats and the development status of related technology.This paper studies the related protocols of the new bus CANFD and analyzes its vulnerability and advantages,and analyzes the requirements of the information security methods.2.The process of vehicle related threat analysis is proposed,including threat modeling and threat classification.In the environment of CANoe9.0,a vehicle network simulation model based on CANFD bus is set up,and on this basis,the theft and deception attack of the simulation model are realized.3.The design of an information anti-theft method,uses the mainstream encryption algorithm of AES,such as block,transformation,S box,the key groups.And design a symmetric encryption algorithm for the variable length of CANFD bus message data field.Implements the software level information encryption method of the CANFD bus based on the CAPL language and C++ dynamic link library,to defend against theft.4.The feasibility and effectiveness of the information theft prevention method proposed in this paper are analyzed by experimental verification under the CANoe9.0 environment.