Then we analyze the influence on the security of challenge-response authentication by collision of hash from two aspects.

然后从两个层面对哈希函数的碰撞对问答认证的安全性可能产生的影响进行了分析。

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Ensure that no passphrase is entered, or else SSH will challenge each authentication attempt, expecting the same passphrase as a response from the user.

确保没有输入通行短语，否则ssh将质疑每次认证尝试，期望用户给出相同的通行短语。

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Challenge - In this case, the server authentication follows a challenge-response dialog.

Challenge——在本例中，服务器身份验证采用询问-响应对话。

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