文章基本信息

标题：A Secure Method Using Cloud in Anti-Collusion Data Sharing Scheme for Dynamic Groups
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作者：Nidhi N G ; Padmashri A M ; Poojitha M 等
期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2017
卷号：5
期号：5
页码：9948
DOI：10.15680/IJIRCCE.2017.0505290
出版社：S&S Publications
摘要：Benefited from cloud computing, users can achieve an effective and economical approach for datasharing among group members in the cloud with the characters of low maintenance and little management cost.Meanwhile, we must provide security guarantees for the sharing data files since they are outsourced. Unfortunately,because of the frequent change of the membership, sharing data while providing privacy-preserving is still achallenging issue, especially for an un-trusted cloud due to the collusion attack. Moreover, for existing schemes, thesecurity of key distribution is based on the secure communication channel, however, to have such channel is a strongassumption and is difficult for practice. In this paper, we propose a secure data sharing scheme for dynamic members.First, we propose a secure way for key distribution without any secure communication channels, and the users cansecurely obtain their private keys from group manager. Second, our scheme can achieve fine-grained access control,any user in the group can use the source in the cloud and revoked users cannot access the cloud again after they arerevoked. Third, we can protect the scheme from collusion attack, which means that revoked users cannot get theoriginal data file even if they conspire with the un-trusted cloud. In our approach, by leveraging polynomial function,we can achieve a secure user revocation scheme. Finally, our scheme can achieve fine efficiency, which meansprevious users need not to update their private keys for the situation either a new user joins in the group or a user isrevoked from the group.
关键词：Access control; privacy-preserving; key distribution; cloud computing