Efficient storage as a service feature provided by the cloud storage providers has exploited the way data is stored by\nmost of the users. Cloud storage providers offer a space on server that can be utilized by cloud users. Data grows at an\nimpressive rate per year but point to be focused is out of that most of data is copy. Although keeping multiple copies of data\nhelps to provide higher availability and long term durability of data, at this point of time the data redundancy is immoderate.\nData deduplication is a solution to tackle this redundancy of data. By keeping single copy of repeated data, data deduplication is\nconsidered a promising solution. This reduces the storage cost by eliminating duplicate data. Improve users experience by\nreducing upload time and saving network bandwidth. This paper presents method to deduplicate files in cloud storage at file\nlevel deduplication. This also presents possible threat of uncontrolled deletion of files by clients in previous approach and it\nsolution.
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