Vehicular Ad-Hoc Networks (VANET) is a special kind of ad-hoc wireless networks that include wireless communication devices with short range, each representing a road vehicle or a static device. Networks VANET (Vehicular Ad-Hoc Networks) represents an area of research interest because of the advantages they bring in development Application traffic optimization, improve road safety, reduce pollution in major urban and more. Many experts consider that this form of ad-hoc network Mobile will become increasingly important in coming years. The development of applications and protocols for VANET networks pose problems unique security induced by devices used for vehicle or sporadic connectivity need to protect the identity of the users. Information which is passed in the VANET network frequently require increased measures to ensure the security of the message. This paper proposes a security protocol to ensure proper submission particular characteristics of VANET systems. The proposed solution is shown to be adequate to protect messages sent between participants traffic. Overall, this paper shows an experiment that wants to turn the compromise between advantages and disadvantages in a step forward in what concerns security in vehicular networks ad-hoc.