置换密码是一种简单的加密技术，采用这项技术将把字母表中的每个字母替换为字母表中的其他字母。
A substitution cypher is a simple encryption technique where every letter of the alphabet is substituted with another letter from the alphabet.
置换密码是一种简单的加密技术，采用这项技术将把字母表中的每个字母替换为字母表中的其他字母。
A substitution cypher is a simple encryption technique where every letter of the alphabet is substituted with another letter from the alphabet.
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