Security-aware Signal Packing Algorithm for CAN-based Automotive Cyber-physical Systems

摘要

Network and software integration pose severe chal-lenges in cyber-security for controller area network(CAN)-based automotive cyber-physical system (ACPS), therefore we employ message authentication code(MAC)to defend CAN against mas-querade attack, but the consequent bandwidth overhead makes it a necessity to find the tradeoff among security, real-time and bandwidth utilization for signal packing problem(SPP)of CAN. A mixed-security signal model is firstly proposed to formally de-scribe the properties and requirements on security and real-time for signals,and then a mixed-integer linear programming(MILP) formulation of SPP security-aware signal packing (SASP) is implemented to solve the tradeoff problem,where the bandwidth utilization is improved and the requirements in both security and real-time are met. Experiments based on both society of automotive engineers (SAE) standard signal set and simulated signal set showed the effectiveness of SASP by comparing with the state-of-the-art algorithm.