由于每次登录时用户提交的认证信息都是固定不变的，传统的口令认证机制容易遭受回放攻击。

Traditional password authentication schemes are vulnerable to replay attacks because of the fixed password and unchanged messages submitted by users for verification.

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要求模拟界面至少具有用户口令文件的注册和用户登录时输入的口令是否正确的结果提示两个功能。

Analog interface requirements at least a registered user password files and user login password is entered when the correct results suggest that the two functions.

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