LiBrA-CAN: A Lightweight Broadcast Authentication Protocol for Controller Area Networks

摘要: Security in vehicular networks established itself as a highly active research area the last few years. However, there are only results so far on assuring security for communication buses inside vehicles. Here we advocate use of protocol based entirely simple symmetric primitives that takes advantage two interesting procedures which call key splitting and MAC mixing. Rather than achieving authentication independently each node, split keys between groups multiple nodes. This leads to more efficient progressive is effective especially case when compromised nodes form minority believe such an assumption be realistic automotive networks. To gain also account construction message codes amalgamated using systems linear equations. We study several variants extremely flexible allowing different trade-offs bus load, computational cost level. Experimental presented state-of-the-art Infineon TriCore controllers contrasted with low end Freescale S12X cores, all these devices wide spread industry. Finally, discuss completely backward compatible solution CAN+, recent improvement CAN.