Location-Release Signature for Vehicular Communications

In this paper, we propose a location-release signature scheme based on bilinear pairings for vehicular ad hoc networks (VANETs). Location-release signature is a capsule signature signed by a source location server that becomes valid after the signature arrives at a specific destination location, where a location server publishes some trapdoor information associated with such a destination location. The scheme can efficiently and effectively resolve the fairness problem in Store-Carry-Forward (S-C-F) communication, which is a very important issue in VANETs. With the provable security techniques, we also demonstrate the proposed scheme is provably secure in the random oracle model.