Abstract:In order to solve the problems of password sniffing, replay attack and unauthorized operation in the current power payment terminal identity authentication and access control, this paper proposes a flexible data access control scheme based on trust and reputation, which is applied in combination with cloud computing technology. To the power terminal equipment data access control. The scheme jointly controls the data access of the power terminal by using attribute-based encryption and proxy re-encryption, the trust level evaluated by the terminal device and the user reputation generated by the plurality of reputation centers, and integrates the concept of user trust level and reputation evaluation into the encryption. In the system to support various control schemes and access strategies. Through the security and performance analysis of the proposed scheme, the fine-grained access control of the scheme is proved, the data confidentiality is good, the communication overhead is flexible and controllable, the computational complexity is low, and the burden of the power terminal equipment is reduced.