The well-known NOTEPAD.EXE program is an editor for plain ASCII text files.
广为人知的NOTEPAD . EXE程序就是专门针对ASCII文本文件的编辑器。
If unauthorized users know anything about the structure of a block of your plain text, they can use that information to decipher the known cipher text block and possibly recover your key.
如果未经授权的用户知道了您的纯文本块结构的任何信息，他们就可以利用该信息来解密已知的密码文本块，并有可能重新获得您的密钥。
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