摘要： 设计了一种两方之间的基于不经意传输的私密交易机制,对于一类特殊的商品——数字产品,如电影、音乐、软件,在交易完成的同时保证销售商不能确定其客户究竟购买何种产品。该机制使用的不经意传输工具与传统的不经意传输不同,其密码学基础不仅包括离散对数,还包括任何安全的公钥密码体系。讨论了其安全性并证明了该机制的通信复杂度与时间复杂度。

关键词: 不经意传输, 私密交易, 公钥, 数字产品

Abstract: This paper designs a two-party private transaction mechanism of digital productions based on oblivious transfer , which accomplishes the transaction with a special catalog of digital products, such as films, music, software and etc., while assures that the venders cann'ot ascertain what products their customer buys. The OT tool used in the mechanism is different from the traditional OT that its cryptology foundation includes not only discrete logarithm but any other secure public key systems as well. It also shows its security and certifies its communication complexity and time complexity.

中图分类号: 

• TP399