Abstract
Vehicle communications are becoming increasingly popular, propelled by navigation safety requirements and by the investments of car manufacturers and Public Transport Authorities. Efforts and research have been performed to secure VANET communications. However, most of the solutions are based on cryptographic computation which is considerably slower and consumes extra energy and may also not satisfy the real-time requirement, without introducing trust in VANET. This gives rise to the need for new solutions aiming at network protection. This article presents a new architecture based on the verification of the alert message content and its semantics by deploying a new reputation system. For this aim, we included a new scheme of valorizing trust for each vehicle into the cryptographic algorithm based on PKI method. A part of simulation was done with the AVISPA web tool.