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Abstract
With the popularity of automobile, traffic safety and our lives are inseparable. In vehicular ad hoc networks (VANETs), the properties authenticity, privacy and traceability have already been considered in many previous researches. Many automotive systems combine their applications with smart life. In this paper, a speedy seamless safe (3-S) messaging mechanism for roadside-to-vehicle authentication and vehicle-to-vehicle communication is proposed. In addition to the essential requirements mentioned above, 3-S messaging mechanism is designed to reduce the computation cost and provide the seamless communication when the vehicle crosses the various regions. With better performance and availability, our scheme can be applied in various VANET applications, especially in safety systems to provide the drivers active safety.