多用户环境中签名方案的安全性研究  

Research on Security of Multi-User Setting Signature Schemes

作　　者：王平水[1] 赵俊杰[2] 

机构地区：[1]安徽财经大学信息工程学院,安徽蚌埠233041 [2]安徽财经大学成人教育学院,安徽蚌埠233061

出　　处：《计算机技术与发展》2009年第1期157-160,共4页Computer Technology and Development

基　　金：教育部社科规划办青年基金项目(07JC870006);安徽省自然科学基金项目(2006KJ017C)

摘　　要：数字签名已经成为网络信息时代身份认证的重要手段之一。为了使数字签名技术得到更广泛应用,研究了数字签名方案在多用户环境中的安全性。众所周知,一个安全的数字签名方案即使在自适应选择明文攻击下存在性伪造在计算上也是不可行的,认为这在多用户环境中是不充分的,为此,将该安全性概念扩充到多用户环境,并通过实例证明了在单用户环境中安全的签名方案施加适当的限制后在多用户环境中同样也是安全的。Digital signature has been a primary means of identity autbentication in era of network information. To make the technology of digital signature be more widely applied, researched the security of the digital signature schemes in the multi - user setting. It was well known that a secure signature scheme must be computationally infeasible even existential forgery against adaptive chosen - message attacks. Argued that it is not adequate for the multi - user setting. For that extended this security notion to the multi - user setting and showed that signature schemes proven secure in the single-user setting can, under reasonable constraints, also be proven secure in the multi - user setting.

关 键 词：数字签名 存在性伪造 密钥置换 随机oracle 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]