Cryptographic Role-based Security Mechanisms Based on Role-Key Hierarchy

摘要

Even though role-based access control (RBAC) can tremen dously help us minimize the complexity in administering users, it is still needed to realize the notion of roles at the resource level. In this paper, we propose a practical eryp tographic RBAC model, called role-key hierarchy model, to support various security features including signature and en cryption based on role-key hierarchy. With the help of rich algebraic structure of elliptic curve, we introduce a role based cryptosystem construction to verify the rationality and validity of our proposed model. Also, a proof-ofconcept prototype implementation and performance evaluation are discussed to demonstrate the feasibility and efficiency of our mechanisms.