Data deduplication is a specialized data compression technique for eliminating duplicate copies of identical data, and it is mostly used in cloud storage to save bandwidth and reduce the amount of storage space. In many organizations, the storage systems contain duplicate copies of many pieces of data i.e. different users save the same file having same data in several different places. Deduplication eliminates these extra copies by saving just one copy of the data and replacing the other copies with pointers that lead back to the original copy. It uses the convergent encryption technique to encrypt the data before outsourcing. For confidentiality we using the concept of Hybrid cloud. The protocol uses authorized duplicate check for hybrid cloud architecture. Different from traditional systems, the differential privileges of users are considered in duplicate check besides the data itself. Our proposed duplicate check scheme incurs minimal overhead compared to normal operations.
Prerana T. Nitnaware : is pursuing ME in Computer Science and Engineering at the KJ College of Engineering & Management Research, Pune, affiliated with SPPU University, Pune, Maharashtra. She had worked with Centre for Development of Advanced Computing (C-DAC), the premier R&D organization of the Department of Electronics and Information Technology, Pune, India from 2008-2012. She received the BE degree in Computer Science and Engineering from Amravati University, Amravati, Maharashtra in 2007.
Vikas B. Maral : received the BE & MTech degree in Computer Science and Engineering from SPPU University, Pune, Maharashtra in 2004 & 2011 respectively. He is now an Assistant Professor at the KJ College of Engineering & Management Research Pune affilited with SPPU University, Pune, Maharashtra. His current research interests include parallel and distributed computing, operating systems, cloud computing and systems security. He published more than 15 papers in national and International journals and conferences, such as International Conference on Computing, Communication Control and Automation, IEEE 2015, ICAC3, International Conference on Contemporary Computing and Informatics, IEEE 2014, International Conference on Computational Intelligence and Computing Research, IEEE 2013, IJARCSMS, IJCSIT, IJECS, IJSR.
In this paper secure deduplication occurs with the help of token generation and secure upload/download of file. It assures the user about high data security and also avoids data duplication in cloud storage. The concept of authorized data deduplication to protect the data security by providing differential privileges of users in the duplicate check. To support authorized duplicate check in hybrid cloud architecture new de-duplication constructions is provided, in which private cloud server is used for the duplicate check, in which the duplicate-check tokens of files are generated by the private cloud server with private keys. Security analysis demonstrates that our schemes are secure in terms of insider and outsider attacks specified in the proposed security model. The proposed system aims to have minimal overhead in entire upload and download process and is negligible for moderate file size.
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