MAC-Based Compression Ratio Improvement for CAN Security

Information security in a controller area network (CAN) is becoming more important as the connections between vehicle’s internal and external networks increase. Encryption authentication techniques can be applied to CAN data frames enhance security. To authenticate frame, message code (MAC) needs transmitted with frame. Therefore, space for transmitting MAC required within Recently, Triple ID algorithm has been proposed create additional field of The ensures every frame authenticated by at least 4 bytes without changing original protocol. However, since uses six header bits, there problem associated low compression efficiency. In this paper, we propose an that remove up 15 bits from compressed algorithm. Through simulation using signals Kia Sorento vehicle LS Mtron tractor, show generation containing messages or reduced 99.57% compared method.