基于属性的代理签密方案

为了达到群组签密的目的以及使得群组签密具有代理功能,利用双线性配对的特性结构及基于属性的密码体制结构,构建出一个基于属性的代理签密方案。其中,将文件用属性集来标识,私钥由访问控制结构来产生,用来控制签密、代理签密和解签密的权限范围。该方案既保持了基于属性签密的优点,又具有代理签名的功能,且具有公开验证性、强可识别性及强不可否认性。最后,对方案进行了安全性分析。

Attribute-based Proxy-Signcryption Scheme

In order to realize the group signcryption and let it have the proxy signcryption functionality,based on bilinear pairing and attribute-based cryptosystem,an attribute-based proxy-signcryption scheme is proposed.In this scheme,the plaintext is labeled with attribute sets,and the private key is generated by access control structure,thus to control the limits of authority for signcryption,proxy sigcryption or designcryption.This scheme has the advantage of attribute-based signcryption while is of the function of proxy signature.It also has open confirmability,strong identifiability and strong non-repudiation.Finally,this paper gives the security analysis of the proposed scheme.