We highly recommend explicitly changing the value of these parameters to valid group names in order prevent unauthorized access.

我们强烈建议明确将这些参数值改为合法的组名，以便防止未授权的访问。

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This paper will show that Zhang et al. 's scheme is insecure, any group member colludes with repeal center can generate a valid group signature without using his secret parameters.

该文提出了一种伪造攻击方案指出张等的方案是不安全的，任一群成员在撤消中心的帮助下可以不利用自己的秘密参数对任何消息生成有效的群签名。

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This paper shows that Chen - Zhu's scheme is universally forgeable, that is, the group authority can forge a valid group signature on an arbitrary message, which stands in any group member.

该文认为该方案是全局可伪造的，群管理员可以对任何消息假冒任何成员生成有效的群签名。

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Researchers measured brain activity of 47 healthy adults -- a small but scientifically valid size group for this type of study -- while using a mobile device.

CNN: Cell phone exposure increases brain cell activity

"It's a false premise, " says retail expert Britt Beemer of America's Research Group on the notion of Wal-Mart's same-store sales as a valid economic measurement.

FORBES: Wizardry At Wal-Mart