Acknowledged secure data dissemination in VANET

VANET – Vehicular Ad-hoc Network is used for various purposes like driver assistance and car safety, infotainment for passengers, also can get local information such as car parking, fuel prices etc., also for car maintenance. Since it provides various advantages to the drivers and passengers we must consider the security of this system. So the information passing between these vehicles must be reliable. Many protocols exist to solve this problem. One of the protocols ABSM – Acknowledged Broadcast from Static to highly Mobile protocol is proposed for efficient and reliable broadcasting in Vehicular Ad Hoc Network. It reduces redundant transmission and it suitable for all kinds of roads. Here CDS-NES technique is used to form the network and broadcasting the messages. The drawback is it does not deal with multiple transmissions simultaneously. Our proposed system uses Position Aware Reliable Broadcasting Protocol to broadcast the message in the network. Based on the position and velocity of the neighbor it selects the neighbors and broadcast the message. Even if failure happens nearest neighbor will starts the transmission. Acknowledgement will piggybacked with the beacon messages. RSA Algorithm is used to generate the key for packet transmission.