CDED:Cloud Data Audit Scheme with Encrypted Data Deduplication
JIN Yu1,2,GONG Xin1,2,HE Heng1,2,LI Peng1,2
1(College of Computer Science & Technology,Wuhan University of Science & Technology,Wuhan 430065,China)
2(Hubei Province Key Laboratory of Intelligent Information Processing and Realtime Industrial System，Wuhan 430065,China)
Abstract：The issue of cloud data security and efficiency in cloud storage is attracting much attention.In generally,the solution to the problem of cloud data security is auditing.And the solution to the problem of cloud data efficiency (i.e.,the problem of duplication) is deduplication.In order to avoid the disclosure of privacy,the data is generally stored on the cloud server after being encrypted.Therefore,we should consider auditing and deduplication of encrypted data.To ensure security and efficiency of cloud data storage,we need an auditing scheme that supports encrypted data deduplication.However,at present,there are drawbacks in the solution that both the encrypted data deduplication and the data integrity verification are considered.For example,① the storage and calculation overhead of the client are large;② the user is always required to participate in the audit process online,and the computation load of the user and the cloud server is large.To solve these problems,the paper presents CDED,a new scheme that supports both encrypted data deduplication and data integrity verification:① proxy reencryption is adopted to ensure data security,so the client does not need to store a large number of encryption keys,and encrypt data before uploading duplicate data;② in the data integrity verification,a new public audit and proxy resignature method to ensure that users do not always have to participate in the auditing process,and reduce the client and cloud server computing.Through theoretical and experimental analysis,CDED overcomes the shortcomings of existing schemes.It does not require users to be online all the time,and the amount of computing on both the client and server side has been reduced.
金瑜,龚鑫,何亨,李鹏,. CDED:支持加密数据去重的云数据审计方案[J]. 小型微型计算机系统, 2018, 39(7): 1498-1503.
JIN Yu,GONG Xin,HE Heng,LI Peng,. CDED:Cloud Data Audit Scheme with Encrypted Data Deduplication. Journal of Chinese Computer Systems, 2018, 39(7): 1498-1503.
2018, Vol. 39 
