Vehicular Ad-hoc NETwork (VANET) is a special network of vehicles which can communicate with one another on the roads. Now-a-days, VANET get increased attention by vehicle manufactures and researchers. However, their deployment requires that security and privacy issues to be resolved, since they rely on wireless communication. In this paper, the authors are going to represent that security architecture built around TPMs can provide satisfactory solution. Moreover, this architecture does not require deployment of base stations along the roads. They will also show that how hardware device like USB memory stick will improve the anonymity in order to prevent unauthorized vehicle tracking.