1. Akl, S.G., Taylor, P.D.: Cryptographic Solution to a Multilevel Security Problem. In: Proc. of CRYPTO '82. pp. 237--249 (1982)
2. Altaha, M., Muhajjar, R.: Lightweight Key Management Scheme for Hierarchical Wireless Sensor Networks. In: Proc. of 7th International Conference on Computer Science, Engineering & Applications. pp. 139--147 (2017)
3. Atallah, M.J., Blanton, M., Fazio, N., Frikken, K.B.: Dynamic and Efficient Key Management for Access Hierarchies. ACM Trans. Inf. Syst. Secur. 12(3), 18:1--18:43 (2009)
4. Incorporating Temporal Capabilities in Existing Key Management Schemes
5. Ateniese, G., De Santis, A., Ferrara, A.L., Masucci, B.: Provably-Secure Time-BoundHierarchical Key Assignment Schemes. In: Proc. of CCS 2006. pp. 288--297 (2006)