An Efficient Attribute-Based Proxy Re-Encryption Scheme Supporting AONT-Based Encrypted Deduplication

The existing attribute-based proxy re-encryption schemes only realize the transformation of ciphertext policies, which are too single-functional to have good applications in specific scenarios. Especially in the context of the big data era, the secure deduplication technology for data has received more attention. However, traditional encrypted deduplication algorithms are not as efficient when dealing with massive amounts of data. In order to improve the storage efficiency of cloud storage service providers, while also reducing the management overhead and computational overhead of the system, a variant of AONT (All-or-Nothing Transform) is designed to realize secure deduplication. Therefore, in this paper, we propose an efficient Attribute-Based Proxy Re-Encryption scheme (AONT-CP-ABPRE) supporting AONT-encrypted deduplication, which is not only used for secure sharing of encrypted data, but also enables the data to be stored in the cloud economically and efficiently. We implemented the new scheme and evaluated its performance. The experimental results show that the proposed AONT-CP-ABPRE scheme has good practicality.