An Efficient And Recoverable Data Sharing Mechanism For Edge Storage

With data growing exponentially, more and more people prefer to share data with others by storing the data in edge servers. However, edge server cannot be deemed completely trustable as the sensitive data my be disclosed. Therefore, in this paper, we propose an efficient and secure data sharing scheme for edge storage by employing Ciphertext-Policy Attribute-Based Encryption (CP-ABE) which can be utilized to conduct fine-grained control. This scheme can not only support data recovery when some edge servers break down by employing Secret Sharing Scheme, but also can support semi-trusted third party authority via employing re-encryption method. That is, the third party authority can not either reveal the private data stored in edge servers. Finally, we analyze security of our scheme to demonstrate that this scheme is resistant to eavesdropping attack and colluding attack. Additionally, relevant experiments results are shown that the scheme is feasibility and efficiency.