A STUDY ON DATA DEDUPLICATION IN CLOUD COMPUTING

Abstract

Cloud computing provides scalable, low-cost and location-independent services over the internet. The services provided ranges from simple backup services to cloud storage infrastructures. The fast growth of data volumes has greatly increased the demand for techniques for saving disk space and network bandwidth. Cloud storage services like Dropbox, Mozy, Google Drive choose a deduplication technique where the cloud server stores only a single copy of redundant data and creates links to the copy instead of storing actual copies. The security of users data become a new challenge. Hence the users encrypt the data before outsourcing to the cloud. Conventional encryption techniques are incompatible with deduplication while convergent encryption resolves this problem effectively. Various research papers have been studied from the literature, as a result, this paper attempts to survey data deduplication techniques in cloud storage along with concepts, categories and methods used in data deduplication.