One of the major concerns of users and organizations outsourcing their data to cloud providers is the issue of data integrity and privacy. Data deduplication is a technique to reduce storage space and eliminate duplicate copies of data by identifying redundant data using hash values to compare data chunks, storing only one copy, and creating logical pointers to other copies instead of storing other actual copies of the redundant data. Deduplication reduces data volume so disk space and network

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... andwidth can be reduced which reduces costs and energy consumption for running storage systems. Data deduplication can be applied at nearly every point in which data is stored or transmitted in cloud storage. Many cloud providers offer disaster recovery and deduplication can be used to make disaster recovery more effective by replicating data after deduplication for speeding up replication time and bandwidth cost savings. Backup and archival storage in clouds can also apply data deduplication in order to reduce physical capacity and network traffic. Moreover, in the live migration process, we need to transfer a large volume of duplicated memory image data. Duplication of data stored in the cloud occupies more space. However, during data updates, duplicate data must be changed in more than one place, which is more complex to rectify and would increase operational costs in the cloud.