The security & privacy issues in Vehicular ad-hoc networks (VANET) are very challenging and must be addressed before they are implemented. VANET is providing various secure services and applications thereby helping the drivers for safe journey and plays an important role in creating Intelligent Transportation system (ITS). In this paper a comprehensive survey is done on various privacy preserving schemes in VANET and a comparison is done on certain parameters to find an efficient privacy preserving scheme.
