A Novel Key Management Scheme in VANETs

To protect users’ privacy and provide efficient and secure key management in Vehicular ad hoc networks (VANETs), this paper proposes a novel Efficient Dynamic Key Management scheme based on Dynamic Secret Sharing, namely EDKM-DSS. The proposed scheme replaces the complex group signature technology with the elliptic curve ElGamal threshold mechanism and the dynamic secret sharing technology, and realizes the key management of the group communication. Experiments results show that the proposed novel scheme can effectively improve the overall performance.