基于RSA数字签名的增强不经意传输协议

RSA-based enhanced oblivious transfer protocol

在RSA签名及关于数据串的不经意传输的基础上提出了一种增强的不经意传输协议,解决了一种不经意传输的接入控制问题.除了具备一般不经意传输协议的特征外,具有如下特点:只有持有权威机构发放的签字的接收者才能打开密文而且发送者不能确定接收者是否持有签字,即不能确定接收者的身份.在DDH假设和随机预言模型下具有可证明的安全性.

Based on the RSA signature and （string） oblivious transfer, an enhanced oblivious transfer protocol is proposed which solves the access control problem for an oblivious transfer protocol. The protocol proposed has the property that only the receiver who has the signture issued by the central authority can open the message which he choose and that the sender can not decide whether the receiver has the signature or not. That is to say, the identity of the receiver can not be confirmed after the protocol. Under the decisional Diffie-Hellman assumption the proposed scheme has provable security.