A dynamic searchable encryption CP-ABE scheme in cloud storage

In this paper, we constructed a dynamic searchable encryption CP-ABE scheme (DSE-CP-ABE)which is based on cipher text index. The scheme combined the existing cipher text strategy of access control scheme, extended inverted index structure, and introduced the trusted third party, which not only realized the cipher text sharing, but also supported for local update of the cipher text.At the same time we used the Proxy Re-encryption to ensure the backward and forward security. Compared with the existing access control schemes, this scheme significantly reduces the number of times of local updates, and is of higher security, reliability and practicability.