摘要： 在椭圆曲线数字签名和不经意的基于签名的电子信封基础上，提出一种增强的不经意传输协议，解决不经意传输的接入控制问题。该方案除了具有一般不经意传输的特性外，还具有只有持有权威机构发放签名的接收者才能打开密文，且发送者既不能确定接收者选择了哪条消息，又不能确定其是否为授权用户。与现有的基于有限域上离散对数问题的不经意传输协议相比，该方案具有数据量更小、计算速度更快、开销更小等优点，具有广泛的应用领域。

关键词: 椭圆曲线数字签名, 不经意的基于签名的电子信封, 不经意传输

Abstract: On the basis of elliptic curve digital signature and Oblivious Signature-Based Envelope(OSBE), an enhanced oblivious transfer scheme is proposed which solves the access control problem for an oblivious transfer protocol. In addition to have the properties of oblivious transfer, the scheme also has the following properties: the receiver who can decrypt the message if and only if he has the trusted third party’s signature, and the sender neither decides which message the receiver acquires nor decides whether the receiver is an authorized user or not. The scheme has less data, faster computation speed and less consumption than others based on Finite Field Discrete Logarithm Problem(FFDLP), it can be widely applied in many fields.

Key words: elliptic curve digital signature, Oblivious Signature-Based Envelope(OSBE), oblivious transfer

中图分类号: 

• TP309