Prediction based dual authentication model for VANET

In vehicular communications, the Vehicular Ad Hoc Network (VANET) is the important role to protect transportation in future. The Broadcast communication is important in vehicular networks, as the safety related applications based on the single hop beacon messages its broadcasts to neighbor vehicles. Since, the dual authentication scheme has critical problem to design a broadcast authentication for secure vehicle-to-vehicle communications. In dual authentication system the vehicles are affects by the computation based Denial of Service (DoS) while the large number of beacons arrive in very short period and this leads to the excessive signature verification which exhaust their computational resources. In this work the Prediction-based Dual Authentication (PBA) is proposed to overcome computation-based DoS attacks, and also resists packet losses caused by high mobility of vehicles. The PBA is the efficient broadcast authentication scheme and also lightweight scheme. However the PBA scheme especially built on symmetric cryptography. In order to reduce the verification delay for some emergency applications, the PBA intend to develop the sender vehicle's can able to predict future beacons in advance. Our proposed scheme only stores the shortened Message Authentication Codes of signature without affecting security to prevent the memory based DoS attacks. To further reduce the verification delay for some emergency time, PBA is intending to develop the sender vehicle's ability to predict future beacons in advance. The dual group key management scheme efficiently broadcast the each valid user in the group and also update frequently if any modification occur in the group. The advantage of our proposed scheme is that the adding / revoking the each user in the VANET group and perform computationally efficient while updating any modification in the group.