The following publications are possibly variants of this publication:
- Crypographic key assignment scheme for access control in a hierarchyChin-Chen Chang, Ren-Junn Hwang, Tzong-Chen Wu. is, 17(3):243-247, 1992.
- A new key assignment scheme for enforcing complicated access control policies in hierarchyIuon-Chang Lin, Min-Shiang Hwang, Chin-Chen Chang. fgcs, 19(4):457-462, 2003. [doi]
- Distributed assignment of cryptographic keys for access control in a hierarchyBao-Min Shao, Jing-Jang Hwang, PeCheng Wang. compsec, 13(1):79-84, 1994. [doi]
- Efficient Hierarchical Key Management Scheme for Access Control in the Mobile AgentYu-Fang Chung, Tzer-Shyong Chen, Chia-Hui Liu, Tzu-Chi Wang. aina 2008: 650-655 [doi]