针对电子调查存在的不少安全问题,如信息欺骗、隐私安全等,构建了一个基于非交互零知识证明(NIZK,non-interactive zero knowledge proofs)的匿名电子调查系统,系统具有自组织、非交互、防重放、更安全等特点。系统采用NIZK协议和Boneh-...针对电子调查存在的不少安全问题,如信息欺骗、隐私安全等,构建了一个基于非交互零知识证明(NIZK,non-interactive zero knowledge proofs)的匿名电子调查系统,系统具有自组织、非交互、防重放、更安全等特点。系统采用NIZK协议和Boneh-Boyen签名方案对用户的身份进行非交互式的验证,保证了系统的真实性;系统还采用Pedersen承诺方案和伪随机函数对用户的身份和相关信息进行隐藏,保证了系统的匿名性。安全性分析表明,系统具有抵抗恶意用户并发攻击和匿名性等安全特性。最后,对系统的功能进行了仿真并验证,结果表明,系统能够正确完成各项功能,并有效地保证系统的匿名性与真实性。展开更多
Message-dependent opening is one of the solutions to solve the problem of the tracing manager owns excessive power.In this paper,we present a new lattice-based fully dynamic group signature scheme with message-depende...Message-dependent opening is one of the solutions to solve the problem of the tracing manager owns excessive power.In this paper,we present a new lattice-based fully dynamic group signature scheme with message-dependent opening by combining an improved version of the fully dynamic group signature scheme proposed by Ling et al and the double encryption paradigm.In addition,we propose an improved underlying zero knowledge protocol,it has a soundness error 1 max(n,p)+1 that is better than the Stern-like protocol,which helps to bring down the communication complexity of the protocol and hence the signature scheme.Our scheme constrains the power of group managers by adding an admitter,and the signature size has a logarithmic relationship with the group size.展开更多
文摘针对电子调查存在的不少安全问题,如信息欺骗、隐私安全等,构建了一个基于非交互零知识证明(NIZK,non-interactive zero knowledge proofs)的匿名电子调查系统,系统具有自组织、非交互、防重放、更安全等特点。系统采用NIZK协议和Boneh-Boyen签名方案对用户的身份进行非交互式的验证,保证了系统的真实性;系统还采用Pedersen承诺方案和伪随机函数对用户的身份和相关信息进行隐藏,保证了系统的匿名性。安全性分析表明,系统具有抵抗恶意用户并发攻击和匿名性等安全特性。最后,对系统的功能进行了仿真并验证,结果表明,系统能够正确完成各项功能,并有效地保证系统的匿名性与真实性。
基金the National Natural Science Foundation of China(Grant No.61932019,No.61772521,No.61772522)the Key Research Program of Frontier Sciences,CAS(Grant No.QYZDB-SSW-SYS035).
文摘Message-dependent opening is one of the solutions to solve the problem of the tracing manager owns excessive power.In this paper,we present a new lattice-based fully dynamic group signature scheme with message-dependent opening by combining an improved version of the fully dynamic group signature scheme proposed by Ling et al and the double encryption paradigm.In addition,we propose an improved underlying zero knowledge protocol,it has a soundness error 1 max(n,p)+1 that is better than the Stern-like protocol,which helps to bring down the communication complexity of the protocol and hence the signature scheme.Our scheme constrains the power of group managers by adding an admitter,and the signature size has a logarithmic relationship with the group size.
