A serious weakness in the recently proposed Chen-Hsu-Harn group authentication and group key establishment scheme is described. A simple attack against the group key establishment part of the scheme is given, which casts doubt on the viability of the scheme.

中文翻译：

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一种不安全的非交互式组密钥建立方案

描述了最近提出的 Chen-Hsu-Harn 组认证和组密钥建立方案中的一个严重弱点。对方案的组密钥建立部分进行了简单的攻击，对方案的可行性提出了质疑。