Security solutions for the CAN bus , bringing authentication to in-vehicle networks

vehicle network, remains insecure. The growing number of attacks reported each year show that, invariantly, in-vehicle buses are not isolated from the outside world. By exploiting their lack of security, adversaries can gain control over virtually any functionality inside the car. We discuss the most promising approaches for assuring security on the CAN-bus after a first decade of attacks and security proposals. Most of the proposals are based on cryptographic mechanisms, but this is not all as some exploit the physical layer or even physical characteristics of the controllers. The surveyed solutions prove a significant degree of maturity and sophistication which suggests that the moment for adoption and standardization by the industry should come.