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 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