Revocable Broadcast Encryption with Constant Ciphertext and Private Key Size  

作　　者：JIA Hongyong CHEN Yue YANG Kuiwu GUO Yuanbo WANG Zhiwei 

机构地区：[1]Zhengzhou University,Zhengzhou 450001,China [2]State Key Laboratory of Mathematical Engineering and Advanced Computing,Zhengzhou 450001,China [3]Nanjing University of Post and Communications,Nanjing 210003,China

出　　处：《Chinese Journal of Electronics》2019年第4期690-697,共8页电子学报（英文版）

基　　金：supported by the the National Basic Research Program of China(973 Program)(No.2012CB315901);the National Natural Science Foundation of China(No.61373006)

摘　　要：In a revocable broadcast encryption scheme,the group manager can flexibly set revoked users who cannot decrypt the ciphertext.Many applications of the revocable broadcast encryption have been found in the secure cloud data sharing.An adaptively secure revocable broadcast encryption system with constant ciphertext and private key size under standard assumptions is more suitable for use in the cloud environment.Few existing revocable broadcast encryption schemes meet such a requirement.We propose a revocable broadcast encryption scheme with constant size ciphertext and private key by combining the RSA cryptographic accumulator with an efficient identity based encryption system.We prove it to be adaptively secure under standard assumptions using dual system encryption techniques.In a revocable broadcast encryption scheme, the group manager can flexibly set revoked users who cannot decrypt the ciphertext. Many applications of the revocable broadcast encryption have been found in the secure cloud data sharing. An adaptively secure revocable broadcast encryption system with constant ciphertext and private key size under standard assumptions is more suitable for use in the cloud environment. Few existing revocable broadcast encryption schemes meet such a requirement. We propose a revocable broadcast encryption scheme with constant size ciphertext and private key by combining the RSA cryptographic accumulator with an efficient identity based encryption system. We prove it to be adaptively secure under standard assumptions using dual system encryption techniques.

关 键 词：CRYPTOGRAPHIC ACCUMULATOR BROADCAST ENCRYPTION REVOCABLE Dual system ENCRYPTION Cloud data sharing 

分 类 号：TN[电子电信]