Attribute-based fine-grained access control with efficient revocation in cloud storage systems

• DOI: 10.1145/2484313.2484383
• Publication Date: 2013-05-14T12:15:27Z
• Authors: Kan Yang; Xiaohua Jia; Kui Ren
• Keywords: Cloud storage; Revocation; Random oracle; Data access

A cloud storage service allows data owner to outsource their the and through which provide access users. Because server are not in same trust domain, semi-trusted cannot be relied enforce policy. To address this challenge, traditional methods usually require encrypt deliver decryption keys authorized These methods, however, normally involve complicated key management high overhead on owner. In paper, we design an control framework for systems that achieves fine-grained based adapted Ciphertext-Policy Attribute-based Encryption (CP-ABE) approach. proposed scheme, efficient attribute revocation method is cope with dynamic changes of users' privileges large-scale systems. The analysis shows scheme provably secure random oracle model applied into practice.