隐藏访问结构的基于属性加密方案

摘要

该文利用双系统密码技术在素数群中提出了一个具有隐藏访问结构功能的基于属性加密方案.该方案的安全性依赖于D-Linear假设和DBDH(Decision Bilinear Diffie-Hellman)假设,并且在标准模型下证明是完全安全的.同时,方案中用户私钥长度和解密过程中双线性对的运算量都为固定值,适用于存储量和计算量小的系统.%Using dual system encryption, a attribute-based encryption scheme with hidden access structures is proposed in prime order bilinear group in this paper. The scheme relies on the D-Linear and Decision Bilinear Diffie-Hellman (DBDH) assumptions, and is proven fully secure under standard model. Moreover, it is suitable for the system with lower storage devices and higher efficiency computations because it achieves constant size private key and constant length of pairing computations.