A Dynamic Re-encrypted Ciphertext-Policy Attributed-Based Encryption Scheme for Cloud Storage

In this paper a dynamic re-encrypted ciphertext-policy attributed-based encryption (DRCP-ABE) scheme is introduced to keep the sharing data safe for cloud storage, which is designed to delegate the cloud service provider to re-encrypt the sharing data and send them to the authorized users, to relieve the data owner of the hard work of data management, especially in the process of authorization and revoking access privileges. Without revealing any information of the access control structure and plaintext, DRCP-ABE can guarantee the sharing data safety for cloud storage in an open environment.