Research On New Vehicular Network Security Architecture And Privacy Protection Authentication Method

In order to achieve secure vehicular network communication,researchers propose to use encryption technology to provide guarantee for message authentication in vehicular network.However,the current public key infrastructure-based authentication schemes can only establish defenses for identity authentication,but not distinguish untrusted vehicles from authorized vehicles,which is difficult to ensure the reliability of messages.On the other hand,in order to realize new applications in vehicular network,such as video streaming downloads,there have been a large number of studies combining cloud computing with vehicular network.However,existing solutions rarely consider the issue of vehicular network authentication in multiple cloud service provider(multi-cloud)environments.In view of the above two problems,this thesis puts forward the corresponding solutions:1)This thesis proposes a 5G vehicular network authentication scheme based on reputation system for the first time,for ensure the reliability of messages.It not only investigates the characteristics of emerging 5G technology and its impact on the vehicular network,but also designs a novel reputation system.A one-way hash function is used to generate the credit references to restrict the vehicles whose reputation score below the threshold from participating in the authentication process,thereby reducing the number of unreliable messages in the vehicular network environment.Since the scheme is based on elliptic curve operations and supports batch authentication,it shows better performance in terms of time overhead than related schemes.2)This thesis proposes a vehicular network authentication scheme in a multi-cloud environment for the first time.It not only investigates the research status of the combination of vehicular network and cloud computing,but also proposes a new model for solving the problems existing in the current combination mode,using cloud agent to free users from the problem of selecting cloud service provider.As vehicle users only need to register with the trusted authority once to achieve authentication with multiple different cloud service providers,the burden of public key management is hidden from the perspective of users.The security analysis proofs that the scheme can achieve the security objectives in the vehicular network,and the performance evaluation shows that the scheme is suitable for the vehicularnetwork authentication in the multi-cloud environment.