一种云计算中的身份认证协议

针对当前在云计算中身份认证机制个人信息容易泄漏的问题，提出了一种云计算中的身份认证协议。协议的安全性是基于离散对数的难解问题。协议模型由用户、云服务提供者和注册实体等三个实体组成；通过先属性注册协议、后身份认证协议两个步骤完成整个认证过程；从用户伪装身份和云服务提供者盗取身份信息两个角度，对协议的安全性进行了分析；通过与云计算中基于公钥生成器的协议进行对比以及实验仿真，证明了该协议在对承诺的注册和认证时间上的优越性。

An Identity Authentication Protocol in Cloud Computing

Considering on the problem that personal information is prone to leak in current authentication mechanism for the cloud computing, we propose a protocols based on the i- dentity properties and zero-knolwedge proof protocols, whose security is based on the in- tractability of the discrete logarithm problem. The model of protocol consistes of three enti- ties= the users, cloud service providers and registers. There are two steps in the protocol, i- dentity register and identity authentication. The security of protocol is analysed from two aspects, that includes user＇s identity disguise and cloud service provider＇s identity informa- tion stealing. Cornpared with the protocd based on the public key generator, experimental simulation clarify the superiority of the agreement at the time of commitment registration and certification.