Secure Data Deduplication Scheme Using Linkage of Data Blocks in Cloud Storage Environment

Abstract

Data de-duplication technology is a technology that helps save storage space by preventing the same data from being repeatedly stored in data storage. There are various methods of data de-duplication, but in general, the file source is divided into data blocks of a predetermined size, and the data de-duplication efficiency is improved by comparing each block. Therefore, each data block has a separate ownership, and each ownership is made smaller than the original of the data block. In this case, an attacker who intends to acquire a block of data can guess the data that can be input into each data block, and thus can make a dictionary attack to acquire data ownership. This happens because each data has a separate ownership, and each ownership does not affect the acquisition of other blocks. Therefore, this study proposes a method to solve this problem.