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In the cloud computing, attribute-based encryption and public key encryption with keyword search are two popular issues. Ciphertext-policy attribute-based encryption is famous for its fine-grained access control. Keyword Search over encrypted files is an important function in the actual situation. We particularly concern the problem of revocation. Additionally, several solutions of the dynamic attribute revocation have been proposed in previous papers. This paper first combines the revocation and keyword search issues. In our proposed scheme, Linear Secret-Sharing Scheme (LSSS) is used for the access policy with efficiency manner as well as to solve the keyword attribute revocation problem.

Ciphertext-Policy Attribute-based Keyword Search with Revocation in Cloud through LSSS Approach