Forming vehicular web of trust in VANET

Today´s VANET applications are vastly focused towards fulfilling users´ requirements on road and making their journey safe and comfortable. In particular, safety applications will provide secure information to users and introduce mechanisms to help reduce the death rate due to road accidents. The most important aspect in such environment is the integrity of this safety information; it must be at all times prevented from being altered by attackers. Attackers try to get benefits from the nature of open wireless medium to launch different kind of attacks in the network to achieve their specific goals. Current DSRC is used as a communication medium for sending the safety and non safety messages from vehicle to vehicle (V2V) and vehicle to infrastructure (V2I). With the introduction of trusted computing several years ago, Trusted Platform Module (TPM) is a security hardware that can potentially handle the software attacks on VANET and maintain the integrity of the data within vehicular network. The main idea behind trusted computing is the hardware based TPM which contains active security modules that supports chain of trust to be built within components of the network. We propose a new model for chain of trust within vehicular to handle all types of attacks and maintain the integrity of messages. Direct Anonymous Attestation (DAA) digital group signature scheme play a key role for developing web of trust and provides security and privacy for vehicle.