Secure Deduplication of Encrypted Data in Cloud

Abstract

Cloud computing platform supports high amount of storage space to store data and provides access to data from remote machines. For data storage and access for data on cloud, the user have to pay the amount on rental basis. As data is stored on remote machines, it must have a facility to avoid the duplicate data; if it is not done the user have to pay additional amount for extra storage occupied by duplicate files. Data deduplication is a mechanism used to avoid data duplication. This is one of the best data compression techniques being used for removing the duplicate copies of repeated data in recent cloud storage. As this data deduplication technique is used to avoid the duplicate files not to be stored on cloud, it also needs to protect the data confidentiality. The private cloud server generates the privileges for the user as read, write, update, modify and delete. If the user gets the access privileges then only he can operate on data through a token id received from the cloud service provider which is unique. The proposed system provides a solution for preserving the data in cloud with the deduplication and also uses a data deduplication load balancing technique for distributing workload across multiple computing resources which includes cluster of computers and network links. In order to protect the confidentiality of sensitive data, AES encryption technique is used.  The objective of work is to save space as well as bandwidth by using deduplication.