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Vehicular Ad hoc NETwork (VANET) are the subset of Mobile Ad hoc NETwork (MANET) in which the communication nodes are mainly vehicles. It connects vehicles which are in 100-300m in wide range. As vehicles fall or drop out of network other vehicle will join and mobile internet is created. Service oriented vehicular networks are special types of VANETS, due to the open wireless medium used in VANET many forms of attacks against service-oriented VANETs that attempt to threaten their security have emerged.