为什么Vigenere密码只能正确加密部分消息?我们开始编写一个Caesar密码,并使用为Caesar创建的辅助函数毕业到Vigenere密码。我的alphabet_position和rotate_character函数似乎正在工作,但我的Vigenere加密函数只能正确返回部分加密消息。
例如,
打印加密(' BaRFoo',Baz)
应该回来了:' CaQGon'
实际上已退回:' CakGo \ x88'
到目前为止,我的代码如下:
import string
def alphabet_position(letter):
return (ord(letter))
def rotate_character(char,rot):
encoded = ""
# loop over characters for ord
char_ord = alphabet_position(char)
# non-alphabet characters
if (char_ord > 90 and char_ord < 97) or char_ord < 65 or char_ord >122:
encoded = encoded + char
return encoded
else:
# set each according to whether upper or lower case
# ord of "Z" is 90, so 91 for upper range and ord of "A" is 65 so
uppercase boundary
if char.isupper():
asciirange = 91
asciibound = 65
else:
# ord of "z" is 122 so 123 for upper range and ord of "a" is 97
so lowercase boundary
asciirange = 123
asciibound = 97
enc_char = ((char_ord + rot) % asciirange)
if enc_char < asciibound:
enc_char = (enc_char + asciibound)
encoded = encoded + (chr(enc_char))
else:
encoded = encoded + (chr(enc_char))
return (encoded)
def encrypt(text,keyword):
encoded_text = ""
key_start = 0
# find rot
alpha = string.ascii_letters
for char in text:
# check if char is a letter
if char.isalpha():
key_num = (alphabet_position(keyword[key_start]))
# convert key_num to a letter to find its index
rot = alpha.find(chr(key_num))
encoded_text += (rotate_character(char,rot))
if key_start == (len(keyword)-1):
key_start = 0
else:
key_start += 1
else:
encoded_text += char
return encoded_text
答案 0 :(得分:0)
for index, char in enumerate(text):
print index, char
抱歉,我不确定这是你要求的,但我试试;) 希望它有所帮助。