期刊名称：International Journal of Computer Science and Network
印刷版ISSN：2277-5420
出版年度：2016
卷号：5
期号：2
页码：388-394
出版社：IJCSN publisher
摘要：A novel privacy-preserving mechanism thatsupports public auditing for shared data stored on cloud.“Ring Signatures” is a technique to compute authenticationmetadata required to review the accuracy of shared data.This mechanism precise that the identity of the signer oneach block in shared data is hidden from public verifiers,who are able to proficiently verify shared data integritywithout retrieving the entire file. Beside the mechanism isable to execute multiple auditing tasks simultaneouslyinstead of verifying them one by one. And with data storageand sharing services in the cloud, users can easily transformand share data as a group. To certify that the shared dataintegrity can be verified publicly, users in a group need tocalculate signatures on all the blocks in shared data. Blocksin these shared data are usually signed by different user dueto data alterations performed by different user. For securitymeasures, when user is revoked from a group, the blockswhich were previously signed by the revoked user must bere-signed by an existing user of a group.
