共查询到18条相似文献,搜索用时 122 毫秒
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为了抵御身份伪造攻击和解决认证效率低的问题,提出了一种基于主从链的跨域身份认证算法(Cross-domain identity Authentication algorithm based on the Master-Slave chain,CAMS)。该算法基于区块链技术利用主从链方式实现了车辆数据的跨域存储和共享,从而提高了跨域身份认证效率。此外,CAMS算法在跨域认证过程中引入了假名的生成和验证参数。在验证消息之前,进一步验证车辆身份,确保认证身份的匿名性,抵御身份伪造攻击。仿真结果表明,CAMS在计算开销和认证效率方面具有较好的性能。 相似文献
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针对现有交互频繁的信息服务信任域(PKI域和IBC域)之间不能实现信息服务实体(ISE)安全高效的跨域认证的问题,提出一种基于区块链的跨异构域认证方案.在IBC域设置区块链域代理服务器参与SM9(国产标识密码)算法中密钥生成,并与PKI域区块链证书服务器等构成联盟链模型,利用区块链技术去中心化信任、数据不易篡改等优点保证模型内第三方服务器的可信性.基于此设计了跨域认证协议与重认证协议,并进行SOV逻辑证明.分析表明,与目前相关方案相比,协议在满足安全需求的前提下,降低了用户终端的计算量、通信量和存储负担,简化了重认证过程,实现域间安全通信,在信息服务跨异构域身份认证过程中具有良好的实用性. 相似文献
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In order to solve the contradictions between user privacy protection and identity authentication, an anonymous authentication scheme under mobile Internet is proposed, which is based on the direct anonymous attestation of trusted computing and uses the encrypting transfer and signature validation for its implementation. Aiming at two access mode of trusted mobile terminal under mobile Internet, self access and cross-domain access, the authentication process of each mode is described in details. The analysis shows that the scheme implements anonymous authentication on mobile Internet and is correct, controllable and unforgeable. 相似文献
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In order to solve the problem of anonymity and controllability of blind proxy re-signature,the concept of partially blind proxy re-signature was introduced by using the idea of partially blind signature.Furthermore,the security definition of partially blind proxy re-signature was also given.Based on the improved Shao scheme,a partially blind proxy re-signature scheme in the standard model was proposed.The proposed scheme allows proxy to add some public information negotiated by delegatee and proxy to re-signature.The scheme not only can achieve the transparent signature conversion from delegatee to proxy and protect privacy of message re-signed by proxy,but also prevented illegal use of re-signature.Analysis results show that the proposed scheme is correct,multi-use,partially blind and existentially unforgeable.It is more suitable for e-government data exchange system,cross-domain authentication system and so on. 相似文献
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基于双线性对的隐藏签名认证方案 总被引:1,自引:0,他引:1
隐藏签名认证方案是指,当用户从CA得到签名(证书)后,在向服务提供商申请服务时,为防止攻击者截获签名或串通服务提供商来陷害自己,用户向服务提供商证明他(或她)有签名而不把该签名给服务提供商。现有的隐藏签名认证方案都不能阻止CA冒充用户身份。该文引入两个证书权威机构CA,假设两个CA不勾结,提出了3个隐藏签名认证方案。这3个方案都能保护用户身份不被任何人(包括CA)冒充;在用户端具备较强计算能力时,后两个方案实现了用户和服务提供商的双向认证;并且在CA具有一定可信度时,第3个方案还能部分抵抗拒绝服务攻击(DoS)。 相似文献
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A conditional privacy-protection remote user authentication scheme based on a certificateless group signature was proposed,which can accomplish the anonymous mutual authentication between the user and the remote doctors.In addition,when the doctors perceived that users were in case of an emergency,the mechanism enabled the only group manager (GM) to expose the real identity information of users and given users timely assistance.The scheme can provide the anonymity,traceability,mutual authentication,non-reputation and some other security features.The performance analysis results show the scheme is more suitable for WBAN. 相似文献
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代理重签名具有转换签名的功能,在云存储、数据交换、跨域身份认证等领域有广泛的应用前景。目前大多数代理重签名方案需要复杂的双线性对运算,无法适用于计算能力较弱的低端计算设备。为了提高代理重签名的签名验证效率,该文给出了双向服务器辅助验证代理重签名的安全性定义,并提出一个高效的服务器辅助验证代理重签名方案,在标准模型下证明新方案在合谋攻击和选择消息攻击下是安全的。分析结果表明,新方案有效减少了双线性对的计算量,大大降低了签名验证算法的计算复杂度,在效率上优于已有的代理重签名方案。 相似文献