使用python实现简单的加密解密机制

# -*- coding: utf-8 -*-
import os,sys  
reload(sys)  
sys.setdefaultencoding(utf8) 
import string

def suanfa(key):
    alp = ABCDEFGHIJKLMNOPQRSTUVWXYZ
    jiami_key = {}
    jiemi_key = {}

    list0 = list(alp)
    list1 = list(key)
    list2 = list(alp)
    for n in list1:
        for m in list2:
            if m == n:
                list2.remove(m)

    alp1 = .join(list2)
    key1 = key + alp1
    list3 = list(key1)

    a = 0
    if a < len(list0):
        for m in list0:
            jiami_key[m] = list3[a]
            a = a + 1
    
    b = 0
    if b < len(list3):
        for n in list3:
            jiemi_key[n] = list0[b]
            b = b + 1
    
    #print jiami_key
    #print jiemi_key
    return jiami_key, jiemi_key  

def bianma(key_dic, data):
    list_data = list(data)
    data1 = []
    for a in list_data:
         if a ==  :
             data1.append(a)

         elif a.islower():
             a = a.upper()
             if key_dic.has_key(a):
                 x = key_dic[a]
                 data1.append(x.lower())

         elif a.isupper():
             if key_dic.has_key(a):
                 x = key_dic[a]
                 data1.append(x)
         else:
             data1.append(a)

    data2 = .join(data1)
    #print data2
    return data2

def main():
    key = ZDFKJMNX
    data = a bdcd sFDGDSGFDG113243 3
    print "秘钥：" + key
    print "明文：" + data

    jiami_key, jiemi_key = suanfa(key)
    miwen = bianma(jiami_key, data)
    mingwen = bianma(jiemi_key, miwen)

    print "加密明文所得的密文：" + miwen
    print "解密密文所得的明文：" + mingwen
    return True

if __name__ == "__main__":
    main()

# -*- coding: utf-8 -*- import os,sys reload(sys) sys.setdefaultencoding(utf8) import string def suanfa(key): alp = ABCDEFGHIJKLMNOPQRSTUVWXYZ jiami_key = {} jiemi_key = {} list0 = list(alp) list1 = list(key) list2 = list(alp) for n in list1: for m in list2: if m == n: list2.remove(m) alp1 = .join(list2) key1 = key + alp1 list3 = list(key1) a = 0 if a < len(list0): for m in list0: jiami_key[m] = list3[a] a = a + 1 b = 0 if b < len(list3): for n in list3: jiemi_key[n] = list0[b] b = b + 1 #print jiami_key #print jiemi_key return jiami_key, jiemi_key def bianma(key_dic, data): list_data = list(data) data1 = [] for a in list_data: if a == : data1.append(a) elif a.islower(): a = a.upper() if key_dic.has_key(a): x = key_dic[a] data1.append(x.lower()) elif a.isupper(): if key_dic.has_key(a): x = key_dic[a] data1.append(x) else: data1.append(a) data2 = .join(data1) #print data2 return data2 def main(): key = ZDFKJMNX data = a bdcd sFDGDSGFDG113243 3 print "秘钥：" + key print "明文：" + data jiami_key, jiemi_key = suanfa(key) miwen = bianma(jiami_key, data) mingwen = bianma(jiemi_key, miwen) print "加密明文所得的密文：" + miwen print "解密密文所得的明文：" + mingwen return True if __name__ == "__main__": main()