Vehicle-inside one-time-one-password communication method based on ECU identity concealment

Abstract

The invention discloses a vehicle-inside one-time-one-password communication method based on ECU identity concealment. The method comprises the following steps: 1) creating a system model; 2) prior to the one-time-one-ciphering by ECU, registering information in the gateway database; 3) using the operation behaviors to the vehicle by the intelligent ECU as the media to generate a coupling effect between vehicle mounted power supply systems so that the vehicle mounted power supply voltage change possess the Markov characteristics and that a true random number is generated to serve as the session key; 4) updating in a fixed time the session key between the ECUs in need of communication so as to prevent replay attacks; and 5) according to the obtained session key, using the attributes of the ECU in the database, creating one-time-one-ciphering data communications based on the ECU ciphered text attributes to ensure the secure communications of ECU inside the vehicle. According to the invention, through the utilization of the stochastic behavior of the power supply voltage inside the vehicle to generate a session key, it is possible to effectively avoid the problem with the tampering and the forgery of information. Through the combination of the vehicle speed unit with the steering wheel, the 500ms cycle dynamic state generates the vehicle speed and serves as the session key for the ECU in order to prevent relay attacks.

Description

technical field [0001] The invention relates to the fields of intelligent network-connected automobiles, in-vehicle networks, one-time pads, etc., and in particular relates to the field of secure communication of electronic control units in vehicles. Background technique [0002] Since 2013, foreign auto giants such as Tesla, BMW, General Motors, and Chrysler have taken the lead in launching the prototype products of intelligent networked vehicles, but a series of cracking and attacks on the intelligent networked vehicle systems have occurred subsequently. In 2013, Charlie Miller&CHris Valasek cracked the Toyota Prius through the vehicle OBD interface; in 2014, BMW recalled 2.2 million vehicles due to security vulnerabilities in its Connected Drive system; in 2015, advanced technology from Carnegie Mellon University and Uber Charlie Miller and CHris Valasek, information security experts at the Technology Research Center, released information security reports on 12 intelligen...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to propose a one-time pad communication method based on ECU identity hiding in the vehicle network to solve security problems such as tampering and counterfeiting of the private data information of the ECU in the vehicle network

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