Cross-layer Privacy Enhancement and Non-repudiation in Vehicular Communication

We propose a security architecture that provides two fundamental security services for VANETS: i) non-repudiation and ii) privacy enhancement. Due to a new PKI concept, referred to as PKI+, users are autonomous in deriving public keys, certificates and pseudonyms which minimizes the communication to the certificate authority. Security techniques are supported on all layers of the protocol stack. In particular we show how to link the PKI+ concepts to solutions for routing in vehicle-to-vehicle and vehicle-to-infrastructure communication.