Research of Security Protocol and Data Compression Method for In-vehicle FlexRay Network

With combination between the control systems of vehicle and Internet technology, the in-vehicle network itself is no longer a local area network with security, but faced with great threat from external world. Pay attention to FlexRay, a security protocol composed with data encryption, data authentication and key distribution are produced. Besides, a data compression method was proposed to reduce the real time problem caused by added security designs. Invoking the CANoe software and Freescale S12XF MCU, a simulated in-vehicle bus system was established to evaluate the designs, which showed a robust ability to defense normal attacks and the real time influence was decrease by 7.54% and 6.23% in transmit side and receive side respectively.