Secure Channel Free ID-Based Searchable Encryption for Peer-to-Peer Group  

作　　者：Xiao-Fen Wang Yi Mu Rongmao Chen Xiao-Song Zhang 

机构地区：[1]College of Computer Science and Engineering, University of Electronic Science and Technology of China Chengdu 611731, China [2]Big Data Research Center, University of Electronic Science and Technology of China, Chengdu 611731, China [3]School of Computing and Information Technology, University of Wollongong, Wollongong, NSW 2500, Australia [4]College of Computer, National University of Defense Technology, Changsha 410073, China

出　　处：《Journal of Computer Science & Technology》2016年第5期1012-1027,共16页计算机科学技术学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China under Grant Nos. 61502086 and 61572115.

摘　　要：Data sharing and searching are important functionalities in cloud storage. In this paper, we show how to securely and flexibly search and share cloud data among a group of users without a group manager. We formalize a novel cryptosystem： secure channel free searchable encryption in a peer-to-peer group, which features with the secure cloud data sharing and searching for group members in an identity-based setting. Our scheme allows group members to join or leave the group dynamically. We present two schemes： basic scheme and enhanced scheme. We formally prove that our basic scheme achieves consistency and indistinguishability against the chosen keyword and ciphertext attack and the outsider＇s keyword guessing attack, respectively. An enhanced scheme is also proposed to achieve forward secrecy, which allows to revoke user search right over the former shared data.Data sharing and searching are important functionalities in cloud storage. In this paper, we show how to securely and flexibly search and share cloud data among a group of users without a group manager. We formalize a novel cryptosystem： secure channel free searchable encryption in a peer-to-peer group, which features with the secure cloud data sharing and searching for group members in an identity-based setting. Our scheme allows group members to join or leave the group dynamically. We present two schemes： basic scheme and enhanced scheme. We formally prove that our basic scheme achieves consistency and indistinguishability against the chosen keyword and ciphertext attack and the outsider＇s keyword guessing attack, respectively. An enhanced scheme is also proposed to achieve forward secrecy, which allows to revoke user search right over the former shared data.

关 键 词：searchable encryption forward secrecy data sharing peer-to-peer group 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TU998.1[自动化与计算机技术—计算机科学与技术]