栅栏密码(Fence code)

所谓栅栏密码,就是把要加密的明文分成N个一组,然后把每组的第1个字连起来,形成一段无规律的话。 不过栅栏密码本身有一个潜规则,就是组成栅栏的字母一般不会太多。(一般不超过30个,也就是一、两句话)

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The so-called fence password is to divide the plaintext to be encrypted into n groups, and then connect the first word of each group to form an irregular paragraph. However, there is a hidden rule in the fence password itself, that is, there are generally not too many letters forming the fence. (generally no more than 30, that is, one or two sentences)