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Vehicular networks are becoming wide technology in traffic system. The entities that are part of a vehicular communication system can be private or public vehicles, road-side infrastructure, and authorities, with the latter considered primarily as network entities. Poorly designed VANETs that permit serious attacks on the network can jeopardize the goal of increased driving safety. The unwanted data can disturb the network communication. The wrong information or inject large volume of data can jam the traffic on roads, this type of data is known as malicious data/unsolicited data. Also, the life safety becomes critical and non trusted behavior of network. Thus the specific characteristics of VANETs result in hard to address security issues, which make the field of secure inter-vehicular communications.
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