Signature Based Authentication for Ephemeral Setup Attacks in Vehicular Sensor Networks

In this paper, we focus on the communication security perspective for connected vehicles that can be categorized into: V2V (Vehicle to Vehicle), V2I (Vehicle to Infrastructure - such as with road side units or a cloud) and the internal vehicle network connections. V2V and V2I improve driving safety and comfort through the dissemination of critical warning messages. We propose a scheme resistant to ephemeral key leakage attacks that imposes pre-computation threat with respect to the static secret key. In particular, the pseudorandom generators that are implemented into the hardware are non-verifiable with respect to sustaining the true randomness while choosing ephemeral keys. We present a formal security model in which the adversary has power to inject ephemeral values of her choice to the protocol and still cannot deduce the static secret keys.