标题：Fully secure decentralized ciphertext-policy attribute-based encryption in standard model
作者：Ma, Chuangui ;Ge, Aijun ;Zhang, Jie
作者机构：[Ma, Chuangui ] Army Aviation Institute, Beijing, China;[Ge, Aijun ;Zhang, Jie ] State Key Laboratory of Mathematical Engineering and Advanced Computi 更多
会议名称：14th International Conference on Information Security and Cryptology, Inscrypt 2018
会议日期：December 14, 2018 - December 17, 2018
来源：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
摘要：In this paper, we introduce a new multi-authority ciphertext policy attribute-based encryption (MA-CP-ABE) system. In our system, there are multiple central authorities (CAs) and attribute authorities (AAs). The CAs will not need to coordinate or even be aware of each other, and so do the AAs. In particular, we present two constructions that will be proved secure in the standard model. Our first scheme is fully secure under static assumptions in composite-order bilinear group, and can work for any monotone access structure. The second one achieves constant size ciphertexts for AND-gate policy in prime-order group. The security can be proved under the decisional linear (DLIN) assumption.
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