A Hybrid Cloud Approach for Secure Authorized Deduplication

Data deduplication is one of important data compression techniques for eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. To protect the confidentiality of sensitive data while supporting deduplication,...

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Vydané v:	IEEE transactions on parallel and distributed systems Ročník 26; číslo 5; s. 1206 - 1216
Hlavní autori:	Jin Li, Yan Kit Li, Xiaofeng Chen, Lee, Patrick P. C., Wenjing Lou
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	IEEE 01.05.2015
Predmet:	Cloud computing Educational institutions Encryption Protocols Servers authorized duplicate check Deduplication hybrid cloud confidentiality
ISSN:	1045-9219
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Abstract	Data deduplication is one of important data compression techniques for eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. To protect the confidentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, this paper makes the first attempt to formally address the problem of authorized data deduplication. Different from traditional deduplication systems, the differential privileges of users are further considered in duplicate check besides the data itself. We also present several new deduplication constructions supporting authorized duplicate check in a hybrid cloud architecture. Security analysis demonstrates that our scheme is secure in terms of the definitions specified in the proposed security model. As a proof of concept, we implement a prototype of our proposed authorized duplicate check scheme and conduct testbed experiments using our prototype. We show that our proposed authorized duplicate check scheme incurs minimal overhead compared to normal operations.
AbstractList	Data deduplication is one of important data compression techniques for eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. To protect the confidentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, this paper makes the first attempt to formally address the problem of authorized data deduplication. Different from traditional deduplication systems, the differential privileges of users are further considered in duplicate check besides the data itself. We also present several new deduplication constructions supporting authorized duplicate check in a hybrid cloud architecture. Security analysis demonstrates that our scheme is secure in terms of the definitions specified in the proposed security model. As a proof of concept, we implement a prototype of our proposed authorized duplicate check scheme and conduct testbed experiments using our prototype. We show that our proposed authorized duplicate check scheme incurs minimal overhead compared to normal operations.
Author	Lee, Patrick P. C. Xiaofeng Chen Yan Kit Li Jin Li Wenjing Lou
Author_xml	– sequence: 1 surname: Jin Li fullname: Jin Li email: lijin@gzhu.edu.cn organization: Sch. of Comput. Sci., Guangzhou Univ., Guangzhou, China – sequence: 2 surname: Yan Kit Li fullname: Yan Kit Li email: liyk@cse.cuhk.edu.hk organization: Dept. of Comput. Sci. & Eng., Chinese Univ. of Hong Kong, Hong Kong, China – sequence: 3 surname: Xiaofeng Chen fullname: Xiaofeng Chen email: xfchen@xidian.edu.cn organization: State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an, China – sequence: 4 givenname: Patrick P. C. surname: Lee fullname: Lee, Patrick P. C. email: pclee@cse.cuhk.edu.hk organization: Dept. of Comput. Sci. & Eng., Chinese Univ. of Hong Kong, Hong Kong, China – sequence: 5 surname: Wenjing Lou fullname: Wenjing Lou email: wjlou@vt.edu organization: Dept. of Comput. Sci., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
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Title	A Hybrid Cloud Approach for Secure Authorized Deduplication
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