A Secure and Efficient Message Delivery Scheme for VANET

In order to meet the need of scalability of vehicular ad hoc network (VANET), when using the roadside unit (RSU) for message authentication and broadcast, many studies have paid little attention to the message transmission delay and the communication overhead caused by the signature. For the sake of guaranteeing the reliability of the message and improve the efficiency of message transmission, this paper proposes a secure and efficient message delivery scheme for VANET. The scheme firstly uses the opp-dir dissemination model to propagate the message to solve the problem of message transmission delay. Then, the message is signed by the aggregate MAC technique to ensure the reliability of the message. Extensive experiments validate that the proposed scheme can reduce the message transmission delay and communication overhead, improve the message delivery ratio.