Research On The Application Of Improved Group Signature Technology In The Vehicular Networking

With the development of the new intelligent transportation system,vehicular networking system has become the core part of building smart city transportation.While the vehicular networking system brings intelligence and convenience to traffic management,there are still problems such as the efficiency and safety of group signature verification and revocation processes.In the existing group signature verification schemes commonly used in the vehicular networking,due to the large size of the signature and the long verification time,the problem of reduced verification efficiency will occur.In the process of signature revocation,the common schemes that can be revoked in batches are generally not very secure,and most schemes with high security can only support the revocation of a single group member.In view of the above problems,this paper improves the group signature scheme applied in the vehicular networking system by adding the bullet proof system on the basis of non-interactive zero-knowledge proof,and tries to reduce the size of the signature while ensuring the security of signature verification,thereby improving the verification efficiency,and build a hierarchical revocation method,by revoking group members in the form of large and small groups,so as to achieve batch revocation of vehicular networking users while stabilizing security.The main research contents of this paper are as follows:(1)The bullet proof in the zero-knowledge proof is applied to the signature verification of the members of the Internet of Vehicles group to improve the verification efficiency.After the group members complete the signature,σ(original signature)is converted into N(commitment value)through the commitment algorithm.When verifying the signature value,use the bullet algorithm to verify the commitment value.If the commitment value is correct,the signature is correct and the signature is acceptable.Conversely,a signature error refuses to accept the signature.Compared with the original signature value σ,the new commitment value is smaller than the original signature value,so the scheme can improve the system verification efficiency,and because the original signature value is not exposed,the scheme can also ensure the security of the system.(2)Build a hierarchical revocation scheme when members are revoked to improve the revocation efficiency.That is,similar members form groups,similar groups form large groups,and so on to form a hierarchical structure.This method not only improves the efficiency of the revocation algorithm,but also this form of hierarchical batch revocation is more suitable for large-scale vehicular networking systems.(3)The correctness analysis and security proof of the scheme proposed in this paper are carried out,and compared with other common group signature schemes that can be used in the vehicular networking.The results show that this scheme has security and improves the signature The verification efficiency and the revocation efficiency of group members.