Sometimes an attacker doesn't need to steal the physical token in order to duplicate it.

有时，攻击者不必盗取物理标记来复制它。

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In order resolve this problem, the application would have to have logic to ignore duplicate messages — not impossible but definitely annoying.

为了解决这个问题，应用程序必须具备一些逻辑来避免重复消息。不是不可能但是非常麻烦。

youdao

The signature consists of information on how the information was processed so someone trying to verify the signature can duplicate the steps exactly in order to get the same result.

签名中包含了信息的处理方式，因此如果有人想要验证签名的话，则重复进行相同的步骤即可获得相同的结果。

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