We believe that this study will contribute to improvements in security of in-vehicle communications. The results of this study show that there is vulnerability to attack when the error handling mechanism is simply designed. LIN (Local Interconnect Network) is a serial network protocol used for communication between components in vehicles. provides advantages, disadvantages, application and described protocol comparison. Furthermore, we present countermeasures against the attacks. Each has its own importance in vehicle based on its Advantages. We experimentally show the feasibility of the attacks using a vehicle microcontroller. In the attacks, the attacker intentionally stops communication using the error handling mechanism and sends a false response in place of a valid one. We present case studies of attacks that use the characteristics of a commonly-used error handling mechanism. In this paper, we present the first evaluation on the security of LIN. The security analysis of LIN is important because it is used in units related to seats, steering wheels, etc. In contrast, there have been no reports that evaluate the security of LIN in detail. Recently, the number of security threats to in-vehicle networks such as the Controller Area Network has increased. This paper presents a security analysis of the Local Interconnect Network (LIN) that is used in assembly units such as seats, steering wheels, and doors in vehicles.
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