基于属性的签密方案

现实生活中存在这样一种情况：具有某些属性的群组中的一个成员，他将上传一些签过名的敏感数据到第三方网站，并希望只能被具有特定属性的群组访问。为满足此需求，文章定义了基于属性的签密方案，其中，文件由属性集标识，私钥由一个访问控制结构产生，用来控制解密权限。最后，给出了方案的正确性证明和安全性分析。

Attribute-based Signcryption Scheme

In real life, existing thus situation, one belongs to a group with some attributes wants to upload sensitive data with his signature to a third-party website, and wants the data can be shared by one belongs to the group possessing specific attributes. To satisfy these needs, we defined an Attribute-based signcryption scheme. In our scheme, the ciphertexts are labeled with sets of attributes, the private keys are associated with access structures that control which texts a user is able to sign or decrypt. Finally, we give the correctness and security analysis of the scheme.