Cryptographic Role-based Security Mechanisms Based on Role-Key Hierarchy ∗
Yan Zhu, Gail‐Joon Ahn, Hongxin Hu, Huaixi Wang · 2013
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 cryp-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-of-concept prototype implementation and performance evaluation are discussed to demonstrate the feasibility and efficiency of our mechanisms.