Data Deduplication Scheme for Cloud Storage

Nowadays, the utilization of storage capacity becomes an important issue in cloud storage. In this paper, we introduce two categories of data deduplication strategy, and extend the fault-tolerant digital signature scheme proposed by Zhang on examining redundancy of blocks to achieve the data deduplication. The proposed scheme in this paper not only reduces the cloud storage capacity, but also improves the speed of data deduplication. Furthermore, the signature is computed for every uploaded file for verifying the integrity of files.