UR-CP-ABE: CP-ABE With Flexible Construction Mechanism and Efficient User Revocation Capability for Access Control in the Cloud. - Zhen Guo; Jiangkai Gao; Shuainan Liu; Rong Wang 006; Chaosheng Feng; Keping Yu; Kim-Kwang Raymond Choo; Mohsen Guizani (IEEE Trans. Dependable Secur. Comput., 2026)