Ciphertext-Policy Attribute Based Encryption Supporting Any Monotone Access Structures Without Escrow  

作　　者：ZHAO Qianqian ZHANG Yuqing ZHANG Guanghua WANG He 

机构地区：[1]State Key Laboratory of Integrated Services Networks, Xidian University [2]National Computer Network Intrusion Protection Center, University of Chinese Academy of Sciences [3]Beijing Key Laboratory of IOT Information Security Technology, Institute of Information Engineering, CAS

出　　处：《Chinese Journal of Electronics》2017年第3期640-646,共7页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61572460,No.61272481);the National Key Research and Development Project(No.2016YFB0800703);Open Fund of Beijing Key Laboratory of IOT Information Security Technology(No.J6V0011104);the China Postdoctoral Science Foundation(No.2015M582622);the National Information Security Special Projects of National Development,the Reform Commission of China(No.(2012)1424);the China 111 Project(No.B16037)

摘　　要：Ciphertext policy attribute-based encryption(CP-ABE)is becoming a new primitive for finegrained access control.It neither produces multiple encrypted copies of the same data nor suffers from the severe burden of key distribution and management.The escrow problem that the central authority could decrypt any ciphertexts addressed to all the specific users is still a challenge for CP-ABE mechanism.One new CP-ABE scheme without escrow is proposed,and furthermore the proposed scheme achieves fully security in the standard model.The performance and security analysis results indicate that the proposed CP-ABE scheme is extremely appropriate for cloud storage system.Ciphertext policy attribute-based encryption （CP-ABE） is becoming a new primitive for finegrained access control. It neither produces multiple encrypted copies of the same data nor suffers from the severe burden of key distribution and management. The escrow problem that the central authority could decrypt any ciphertexts addressed to all the specific users is still a challenge for CP-ABE mechanism. One new CP-ABE scheme without escrow is proposed, and furthermore the proposed scheme achieves fully security in the standard model. The performance and security analysis results indicate that the proposed CP-ABE scheme is extremely appropriate for cloud storage system.

关 键 词：CP-ABE The escrow problem Fully security In the standard model 

分 类 号：TN918.4[电子电信—通信与信息系统]