整理了一些东西，方便单表密码分析。 分析单表替换密码：http://www.counton.org/explorer/codebreaking/frequency-analysis.php 这网站上同时还有一些简单的密码分析 下面是一个替换后上下两行显示明密文通过颜色对比的shell

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#!/bin/bash
#rois_yf
##################################################

cipher="oivqmqgn, yja vibem naarn yi yxbo sqnyab yjqo q zixuea is gaqbn qdi. ykra jqn zira yi baseazy yjqy qeni ko yja ujbqzw rqdqhkoa. yjkn kn vjqy yja uquab saam kn qpixy: gix nxprky q uquab, va backav ky qom ky dayn uxpeknjam. oi oaam yi vqky q rioyj ib yvi xoyke gix naa gixb qbykzea ko yja oafy ujbqzw knnxa, vjao yja ykra jqn zira, va'ee mazkma yi zirukea q oav knnxa sbir yja qbykzean yjqy jqca paao nxprkyyam. yjqy'n pqnkzqeeg ky. qom dbqp gix seqd jaba, zbguyiiiniziieqrkbkdjy?"
tranOrl='yjaqnarikevz'
tranRst='theasemoilwc'

##################################################

echoKnownPlain()
{
#white
	echo -n -e "33\[0m$133\[0m"
}
echoCipher()
{
#red
	echo -n -e "33\[31m$133\[0m"
}
echoUnknownPlain()
{
#blue
	echo -n -e "33\[36m$133\[0m"
}

plain=\`echo $cipher | tr $tranOrl $tranRst\`

cols=\`tput cols\`

echo
echo
tput cuu 2
tput sc
for((i=0;i<${#plain};i++))
{
	tput rc
	echoCipher "${cipher:i:1}"
	tput sc
	tput cud 1
	tput cub 1
	if \[ "${plain:i:1}" != "${cipher:i:1}" \];
	then
		echoKnownPlain "${plain:i:1}"
	else
		echoUnknownPlain "${plain:i:1}"
	fi

	if (( $\[$cols-1\] == $\[$i%$cols\] ));
	then
		echo
		echo
		tput cuu 1
		tput sc
	fi
}
echo

效果如下 最后是个简单的替换脚本

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#!/usr/bin/env python  
#\-\*\- coding:utf-8 -*-

"""
rois_yf
"""

import sys
import os
import string

def main():
    cipher = "oivqmqgn, yja vibem naarn yi yxbo sqnyab yjqo q zixuea is gaqbn qdi. ykra jqn zira yi baseazy yjqy qeni ko yja ujbqzw rqdqhkoa. yjkn kn vjqy yja uquab saam kn qpixy: gix nxprky q uquab, va backav ky qom ky dayn uxpeknjam. oi oaam yi vqky q rioyj ib yvi xoyke gix naa gixb qbykzea ko yja oafy ujbqzw knnxa, vjao yja ykra jqn zira, va'ee mazkma yi zirukea q oav knnxa sbir yja qbykzean yjqy jqca paao nxprkyyam. yjqy'n pqnkzqeeg ky. qom dbqp gix seqd jaba, zbguyiiiniziieqrkbkdjy?"
    print
    print (cipher)
    translate_table = string.maketrans('yjaqnarikovbceszxupgmd', 'theasemoinwrvlfcupbydg') 
    print (cipher.translate(translate_table))
    return

if \_\_name\_\_ == '\_\_main\_\_':
    main()