【作者】 李梦东； 杨义先； 马春光； 蔡满春；

【Author】 Li Mong Dong , Yang Yi Xian(Information Security Center. Beijing Univ. of Posts and Telecomm. Beijing 100876)

【机构】 北京邮电大学信息安全中心126信箱； 北京邮电大学国家重点实验室；

【摘要】 公平的签名交换方案是实现数字合同签署、电子支付等电子商务活动的一项重要技术,它的有效实现一直是人们追求的目标.我们利用最近Boneh提出的基于双线性聚集签名的签名可验证加密方案,设计了一种公平的签名交换方案,该方案基于双线性群对上计算co_Diffie-Hellman假设,借助双线性映射实现加密可验证性,具有签名长度短、计算简便等优点,可有效提高公平签名交换的实现效率.更多还原

【Abstract】 The scheme of fair exchange of digital signatures is important tool to signing digital contracts, e-payment and other electronic commerce actions. Its efficient realization has still been pursued since it appeared. Based on Boneh’s bilinear verifiable encrypted signature scheme in that assumes the so-called computational co-Diffie-Hellman problem is difficult on the bilinear group pair, a scheme of fair exchange of digital signatures is proposed in this paper. The scheme has the properties of short signature, low computation and verification cost. It can very efficiently and fairly exchange signatures of two parties aided by bilinear mapping.更多还原