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Secure communication over CANBus

In this paper, we propose hardware based secure and trusted communication over CAN bus in the intra vehicle network connecting electronic Control Units (ECUs). CAN bus is an insecure communication channel, connecting resource constraint devices that have limited resources to devote for data security and real-time requirements to meet the safety critical design specifications. We propose a hardware based secure and trusted framework that implements lightweight PUF based mutual authentication and secure encryption over the insecure communication channel. The paper discusses the framework design and implementation details along with the resource utilization and performance analysis of the proposed system.