因为这个密码不能第二次使用，故而从理论上来说，即使黑客安装了密码嗅探器也没关系。
The theory is that it doesn't matter if a hacker is running a password sniffer, since the password won't work a second time.
任何人都可以在您的网络或远程计算机上使用包嗅探器查看交换的信息，有时甚至可以查看密码信息。
Anybody with a packet sniffer on your network or on a remote machine can view the information as it is exchanged, sometimes even password information.
用FTP上传包含数据库用户名和密码的PHP文件到远程WEB服务器时，恶意的监听者就会通过探嗅数据包来获得密码。
Transferring a PHP file that contains database passwords to your remote Webserver over an insecure protocol like FTP can allow an eavesdropper to sniff the packets and reveal your password.
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