The scenario is for sybil attack and its detection Vehicular ad hoc networks where Roads are divided into segments, with each segment containing its own set of roadside units RSUs (wired connection). when vehicle enters the road segment it gets the certificate from the first RSU (registration process) and that vehicles certificate is shared with other RSUs. some vehicles do not register, get no certificate and hence when try to communicate with RSUs or vehicles are considered malicious. after leaving the segment vehicles certificate is expired/revoked. Also please tell me the payment mode and by what time can you submit the program. If you need more details mention it.