Efficient Attribute-Based Proxy Re-encryption for Secure Deduplication.

More and more data files are stored in cloud servers because of storage space. At the same time, many cryptographic techniques have been proposed to protect data privacy. However, a large amount of duplicate data is stored in the cloud server, resulting in a waste of resources. Most of the existing solutions rarely consider the problem of wasting storage resources. In this paper, we propose an attribute-based encryption (ABE) scheme that supports deduplication. What’s more, we implemented the verification of data files using blockchain. Finally, experimental simulations show that the proposed mechanism can improve the efficiency of processing duplicate data and reduce latency.