Abstract: By considering the dynamic user access privilege and the potential leakage of secret key, a direct revocable ciphertext policy attribute-based encryption (usually shorten as CP-ABE) scheme with constant-size ciphertext is proposed in this paper. Different from the indirect revocable CP-ABE, the proposed approach allows the data owner to assign the revoked users during the encryption without interacting the attribute authority periodically. The definition and security model of the direct revocable attribute-based encryption scheme are given and a concrete scheme is also constructed correspondingly. The security proof of the scheme is given under the standard model. The results of comparative analysis show that the scheme achieves higher computational efficiency and supports more flexible access structure than the state-of-the-art.