De-duplication with Safe Authorization Using Pattern matching Algorithm for Hybrid cloud

In recent few years, cloud computing provides high amount of data storage space and it provides parallel computing at low cost. Cloud is used to store high amount of data .Everyday high amount of data will be generated & i.e to be stored on cloud ,so due to huge amount of data storage it rises new issues or challenges. The data deduplication technique is used for reducing the storage requirement by eliminating the repeated data on the cloud. Only one unique object of the data is actually is stored on the media for example on disk or tape. Repeated data is replaced with a pointing to the single data copy. For example, an email may contain 100 objects of the same 1 MB file attachment, If the email is back up, all 100 objects are saved, requiring 100 MB storage space with data deduplication. Only 1 object of the attachment is actually stored .now each object is just refer back to the one saved copy. In this instance the 100 Mb storage requirements could be reduced to only 1 MB. Data deduplication works with convergent encryption technique to encrypt data before uploading. In the large firms the deduplication method is used in back up and the disaster recovery applications. This paper addresses the secure authorized data dedupication problem in the existing encryption systems.