题目内容
（请给出正确答案）
[主观题]
关于数字签名的描述中，错误的是（)。A．通常能证实签名的时间B．通常能对内容进行鉴别C．必须采用DSS
关于数字签名的描述中，错误的是()。
A．通常能证实签名的时间
B．通常能对内容进行鉴别
C．必须采用DSS标准
D．必须能被第三方验证
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第4题
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