Dynamic permission access control model based on privacy protection

Access control technology is one of the key technologies to ensure safe resource sharing. Identity authentication and authority distribution are two for access restrict unauthorized users from accessing resources, only authorised legal can resources. However, user privacy protection frequent permission changes thorny issues that need be solved urgently by technology. In this paper, a dynamic model based on proposed deal with these problems. Compared existing technologies, main advantages paper as follows: (1) Encrypt hide attributes entities, use attribute-based identity authentication, which not achieves purpose traditional but also ensures entities leaked; (2) Binding permissions entity attributes, dynamically assigning adjusting through in making more fine-grained flexible. Security proof performance analysis show protocol secure under hardness assumption discrete logarithm problem decision bilinear Diffie–Hellman problem. cited references, has low computational complexity, short time, communication overhead.