An Improved Dual Authentication Techniques for Secure Data Transmission in VANETs

Research related to user authentication techniques in vehicular ad hoc networks (VANETs) has received significant attention in the last decade. However, its security and privacy still become a central issue that is widely open to discussion. In 2016, Vijayakumar et al. published dual authentication and key management techniques for secure data transmission in VANETs. The scheme aims to provide a high level of security on the vehicle side to prevent unauthorized vehicles from entering the VANETs effectively. It relies on the fingerprint and hashes code HC for the authentication process. The authors claimed that the mechanism could withstand the replaying attack by appending it with an updated timestamp and the packet's transmission. However, this paper shows that their scheme suffered a denial of service (DoS) attack due to misplaced timestamps. So, we propose an improvement of their scheme to withstand the attacks.