Deduplication On Cloud Storage

Abstract

Day by day people are moving towards cloud storage for ease of accessibility, availability, security etc. Data Deduplication helps cloud storage to utilize storage space efficiently. Deduplication process is easy when data are stored in plaintext but challenging when data are in encrypted form. Deduplication can be categorized at file level and block level and server-side and client-side deduplication. Many deduplication scheme were proposed like convergent encryption, message locked encryption etc. To mitigate offline brute-force attack key servers were added in many scheme and multiple key servers are added for single point of failure and collude attack between Key servers and CSP(cloud service provider). Tag based scheme are used to reduce extra bandwidth and easy duplication for encrypted files. Randomized tag generation is used in proposed scheme with help of self generation deduplication decision tree using public seed in non interactive way. Strong tag consistency is provided to overcome issue of fake file uploading attack which can be check while file uploading time.