Abstract
Anonymous authentication has significant contribution to privacy protection in safety message dissemination for Vehicular Ad Hoc Networks (VANETs); however, it suffers from heavy workload of vehicle revocation check and message signature verification, which leads to unsatisfactory timeliness and high message loss rate in heavy traffic situations. To manage these challenging problems, this paper proposes an efficient safety message authentication protocol for VANETs by combining batch group signature verification and our proposed Group Session Key (GSK). Specifically, our signature verification method for safety message can both achieve computation efficiency by reducing the number of computation operations of bilinear pairing and resist impersonation attack by using tracking key implement. GSK is associated with the forward and backward keys and is only shared among unrevoked vehicle within a group. Performance analysis and simulations demonstrate that our protocol can provide promising security against various common types of attackers and is more efficient than traditional group-signature-based authentication protocols, in terms of computation time cost, authentication delay and message loss rate.
Highlights
By supporting the exchange of safety messages, including location, speed and other driving information, between intelligent vehicles, Vehicular Ad Hoc Networks (VANETs) can greatly improve driving safety and traffic efficiency [1]–[4]
Safety message exchange is usually based on open-air radio, and various security attacks, such as bogus information attack and impersonation attack, might be launched to VANETs [6]
Through Group Session Key (GSK)-based check in our method, a vehicle can quickly verify the validity of a sender as a group member, and using batch authentication method, a vehicle can authenticate a large number of messages in a short time
Summary
By supporting the exchange of safety messages, including location, speed and other driving information, between intelligent vehicles, Vehicular Ad Hoc Networks (VANETs) can greatly improve driving safety and traffic efficiency [1]–[4]. One of the main drawbacks of these two protocols is that they both require vehicles to change pseudonyms periodically to protect vehicle identity from revealing to potential attackers, which will incur considerable overhead in generation, delivery, storage, and verification of numerous certificates (or private keys in the case of IBC). To mitigate this overhead, group signature based protocols [21]–[25] introduce a group-wide public key such that any vehicle in a group can sign messages on behalf of the group and interacting with centralized pseudonym providers and updating pseudonyms can be avoided.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
