Early detection of DOS attacks in VANET using Attacked Packet Detection Algorithm (APDA)

The security of VANET (Vehicular Ad Hoc Networks) is crucial as their very existence relates to critical life threatening situations. VANET is a subtype of the MANET. In which the mobile nodes are all vehicles equipped with an On-Board Unit (OBU) that enable them to send and to receive messages to the other Nodes in the network. In addition to communication among the vehicles, VANET interface with communication points provided by on road infrastructure. Many of the Researchers have already proved about the securing safety messages. Moreover VANET face several security attacks. In existing VANET systems is using a detection algorithm to detect the attacks at the verification time in which delay overhead occurred. The various security threats are misbehaving nodes give false information, Sybil attacks, selfish driver attacks, and etc. In this paper we proposed an Attacked Packet Detection Algorithm (APDA) which is used to detect the DOS (Denial-of-Service) attacks before the verification time. This minimizes the overhead delay for processing and enhances the security in VANET.