Data hierarchical credible encryption method

The invention discloses a data hierarchical credible encryption method and belongs to the field of data processing. The method comprises the following steps: a data encryption step: acquiring a symmetric key K, symmetrically encrypting first data, and generating content encrypted data; a data credible encryption step: encrypting the first data based on a credible pointer to generate credible encrypted data; and an unsecret key encryption step: encrypting the symmetric key K based on the public parameter PK and the attribute of the access structure tree T to generate an access key EK which corresponds to at least one access private key SK. The safety of encrypted data is high. 一种数据分层可信加密方法，属于数据处理领域。它包括数据加密步骤，获取对称密钥K，对称加密第一数据，生成内容加密数据；数据可信加密步骤，基于可信指针加密所述第一数据，生成可信加密数据；解秘秘钥加密步骤，基于公开参数PK和访问结构树T属性加密对称密钥K，生成访问秘钥EK，访问秘钥EK对应有至少一个访问私钥SK。它加密的数据的安全性高。