Due to single-time registration, the multi-server authentication provides benefit for getting services from different servers through trusted agent. Generally, users feel hesitation for registering themselves individually with all service providers due to the problem of memorizing the multiple passwords. The multi-server authentication allows a quick access to services by real-time customer validation on public channel. Thereafter, hundreds of multi-server authentication protocols have been introduced. However, the more efficient and robust authentication schemes are being explored by the research academia. We introduce an anonymous scheme that resists the major security threats like impersonation attack, insider attack and password modification attacks in viable computing cost. We use random oracle model for formal security analysis of the proposed scheme. The performance analysis shows that the proposed scheme incurs less computation, energy, communication and storage cost as compared to related protocols. This analysis and comparison show that our proposed scheme is quite effective for the purpose of anonymous authentication and key agreement.

由于单次注册，多服务器身份验证提供了通过可信代理从不同服务器获取服务的好处。一般来说，由于记住多个密码的问题，用户对于是否向所有服务提供商单独注册感到犹豫。多服务器身份验证允许通过公共渠道上的实时客户验证来快速访问服务。此后，数百种多服务器身份验证协议被引入。然而，学术界正在探索更有效、更强大的身份验证方案。我们引入了一种匿名方案，以可行的计算成本抵御冒充攻击、内部攻击和密码修改攻击等主要安全威胁。我们使用随机预言模型对所提出的方案进行正式的安全分析。性能分析表明，与相关协议相比，所提出的方案需要更少的计算、能源、通信和存储成本。分析和比较表明，我们提出的方案对于匿名认证和密钥协商的目的是非常有效的。