针对现有的可撤销属性基加密方案密钥量过大且不稳定和效率不高的缺点,本文提出了一种新的基于多线性映射的撤销方案.该方案基于多线性映射问题,并将公钥广播加密与密文策略的属性基加密相结合,设计两层密文.效率分析表明,该方案达到了私钥和更新密钥的固定量级,提高了效率;在可选择的撤销列表模型下,基于3重多线性Diffie-Hellman Exponent((3,N)-MDHE)假设,证明了方案是选择明文攻击安全的. In order to overcome the shortcomings of the current keyless revocation-based encryption schemes such as large amount of keys and unstable and inefficient keys, this paper proposes a new revocation scheme based on multi-linear mappings. This scheme is based on the problem of multi-linear mapping, Public key broadcast encryption and ciphertext property based on the combination of encryption, the design of two ciphertexts.Efficiency analysis shows that the scheme to achieve a fixed order of private key and update the key to improve efficiency; in the optional revocation list Model, based on the assumption of 3-multi-linear Diffie-Hellman Exponent ((3, N) -MDHE), it is proved that the scheme chooses to be plaintext attack-safe.