Authentication is one of the most fundamental services in cryptography and information security. Compared with the traditional authentication methods, group authentication allows a group of users to be authenticated at once rather than authenticating each of these users individually. Therefore, it is more desirable in the group oriented environment, such as multicast/conference communications. In this paper, we first demonstrate that a recent group authentication scheme by Chien (Security and Communication Networks, 2017) suffers some security flaws, i.e. an adversary in the asynchronous communication model can pretend to be a legitimate group member without being detected. We then use the Anonymous Veto Networks (AV-net) to patch Chien’s scheme, so that its security can be rigorously proved in a well-defined security model.

中文翻译：

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具有多个试验和多个身份验证的组身份验证方案的密码分析和改进

身份验证是密码学和信息安全中最基本的服务之一。与传统的身份验证方法相比，组身份验证允许立即对一组用户进行身份验证，而不是分别对每个这些用户进行身份验证。因此，在诸如多播/会议通信之类的面向组的环境中，这是更理想的。在本文中，我们首先证明了Chien（Security and Communication Networks，2017）最近使用的群组身份验证方案存在一些安全漏洞，即异步通信模型中的对手可以伪装成合法的群组成员而不会被发现。然后，我们使用匿名否决权网络（AV-net）修补Chien的方案，以便可以在定义明确的安全模型中严格证明其安全性。