Cross-Platform Data Deduplication and Ownership over Encrypted Data

Abstract

Data deduplication is the most important data compression technique used in the cloud domain. With this technique, cloud service providers can utilize their storage space efficiently to store large amounts of data. There are various benefits of the deduplication technique such as efficient storage allocation in the disk which only writes unique data. Organizations get better mileage out of their storage service by allowing better storage allocation. Deduplication optimizes the storage without sending data over the network which ensures network optimization. Deduplication enables backups to be recovered much faster by eliminating redundant ata from the equation. To securely store the private data on the cloud, users may upload data in an encrypted form, it is very difficult to check deduplication on encrypted data. The server performs the deduplication on public data or plaintext data by scanning the file and comparing it to others but in the private data deduplication server must compare the tags. In private data deduplication organization also needs to provide the data privacy to their clients. It is difficult for the server to check the ciphertext and tag consistency. Various data deduplication schemes are proposed for encrypted data deduplication, some of them have considered single servers and some have considered multiserver of single CSP. However, they do not consider the data deduplication and ownership of the data in the cross-platform scenario in which multiple CSP communicates with each other for data deduplication and checks the data ownership as well. Previously proposed schemes are also unable to provide the ciphertext and tag consistency at the server side in cross-platform data duplication. Ownership of the data stored on multiple cloud service providers is also an important part of the deduplication which ensures that a particular file belongs to which user, where the user might not be the creator of that file. Here, we propose a scheme that tackles the problem of server-side ciphertext and tag consistency and provides data deduplication on cross-platform.