Privacy Preseving Attribute Based Searchable Encryption Scheme in Intelligent Transportation System
In order to solve the problem that the travel information of vehicle users in Intelligent Transportation System(ITS)is easy to be illegally stolen and the traffic data stored in the cloud server of transportation system is abused by malicious users,a new Attribute Based Searchable Encryption(ABSE)scheme is proposed in this paper,which has the functions of privacy protection,key aggregation and lightweight calculation.The scheme realizes full privacy protection in key generation stage,access control stage and partial decryption stage.The search keyword is embedded into the access structure,which can realize partial policy hiding and keyword security.Through key aggregation technology,all file identities that meet the search conditions and access policies are aggregated into one aggregate key,which reduces the burden of key storage for users,and further ensures the security of file keys and data.The security analysis shows that the scheme has the advantages of hidden access structure security,keyword ciphertext indistinguishable security and trapdoor indistinguishable security.The theoretical analysis and numerical simulation showed the proposed scheme was efficient and practical in terms of communication and computing overhead.
万方数据
维普
