通信学报2017，Vol.38Issue(3)：25-33,9.DOI:10.11959/j.issn.1000-436x.2017057
新的云存储文件去重复删除方法
New method for file deduplication in cloud storage
摘要
Abstract
Deduplication is widely used in cloud storage service to save bandwidth and storage resources,however,the security of client deduplication still flaws in an external attack to access a user's private data.Xu-CDE,a deduplication solution of encrypting data for multi-client was first proposed,which could protect the privacy of data from the external attackers and honest but curious server,with favorable theoretical meaning and representativeness.However,in Xu-CDE,the user ownership authentication credentials were lack of instantaneity protection,which could not resist replay attack.As an improvement to the flaw,the protocol MRN-CDE (MLE based and random number modified client-side deduplication of encrypted data in cloud storage) was proposed,adding random number in order to ensure the instantaneity of the authentication credentials,and using the algorithm of MLE-Kp to extract key from original file to replace the e itself as an encryption key.As a consequence,the new protocol improved security while significantly reduced the amount of computation.After the safety analysis and the actual tests,results show that based on Xu-CDE,the proposed protocol MRN-CDE has stronger security of ownership,and improves time efficiency.Specially,the new protocol works better on large files in cloud with a certain value.关键词
加密数据/去重/所有权认证/实时性/云存储Key words
encrypted data/deduplication/proof of ownership/instantaneity/cloud storage分类
信息技术与安全科学引用本文复制引用
杨超,纪倩,熊思纯,刘茂珍,马建峰,姜奇,白琳..新的云存储文件去重复删除方法[J].通信学报,2017,38(3):25-33,9.基金项目
国家自然科学基金资助项目(No.61672415,No.61671360,No.61672413) （No.61672415,No.61671360,No.61672413）
陕西省教育厅科研基金资助项目(No.14JK1665)The National Natural Science Foundation of China (No.61672415,No.61671360,No.61672413),The Natural Science Project by Shaanxi Province Office of Education (No.14JK1665) （No.14JK1665）
