#Vigenere Cipher EncryptedMessage ="" 模式="" Keywordcount = 0#将所有内容设为0
while Mode != "encrypt" and Mode != "decrypt":
Mode = input('Do you want to encrypt or decrypt a message?')
Mode = Mode.lower()
if Mode == "encrypt":
Keyword=input('Please enter the keyword you want to use:')
Message=input('Please eneter the message you witsh to encrypt: ')
Keywordlength = len(Keyword)
for i in range(0, len(Message)):#
Messageencrypt = Message[i]
Keywordencrypt = Keyword[Keywordcount]
if Messageencrypt.isalpha():
if Messageencrypt.isupper():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt + Keywordencrypt
if CodedMessage > 90:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
elif Messageencrypt.islower():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt + Keywordencrypt
if CodedMessage > 122:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
else:
Encryptedletter = Messageencrypt
EncryptedMessage = EncryptedMessage + Encryptedletter
Keywordcount = Keywordcount + 1
if Keywordcount >= Keywordlength:
Keywordcount = 0
print(EncryptedMessage)
if Mode == "decrypt":
Keyword=input('Please enter the keyword you want to use:')
Message=input('Please eneter the message you witsh to decrypt: ')
Keywordlength = len(Keyword)
for i in range(0, len(Message)):#
Messageencrypt = Message[i]
Keywordencrypt = Keyword[Keywordcount]
if Messageencrypt.isalpha():
if Messageencrypt.isupper():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt - Keywordencrypt
if CodedMessage > 90:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
elif Messageencrypt.islower():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt - Keywordencrypt
if CodedMessage > 122:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
else:
Encryptedletter = Messageencrypt
EncryptedMessage = EncryptedMessage + Encryptedletter
Keywordcount = Keywordcount + 1
if Keywordcount >= Keywordlength:
Keywordcount = 0
print(EncryptedMessage)
程序正确加密但未正确解密 有人解释什么是错误的
答案 0 :(得分:0)
您在加密和解密中使用CodedMessage
变量的更高边界检查(即if CodedMessage > 90:
)。这适用于加密,因为您希望编码消息ASCII十进制代码比原来大,因为您正在添加密钥加密。但是,对于你的解密,你没有添加,你正在减去密钥:
CodedMessage = Messageencrypt - Keywordencrypt
这意味着您现在希望CodedMessage
比以前更小,这使得更高的边界检查无效。然后,您可以将代码更改为:
if CodedMessage < 65: #for upper letters
if CodedMessage < 97: #for lower letters
答案 1 :(得分:0)
试试这个:
<img ng-src="http://img.youtube.com/vi/{{video.resourceId.videoId}}/hqdefault.jpg" alt="Video Thumbnail" class="img-responsive"/>
这些是我在diff格式中所做的更改:
#Vigenere Cipher
EncryptedMessage=""
Mode=""
Keywordcount = 0 #sets everything to 0
while Mode != "encrypt" and Mode != "decrypt":
Mode = input('Do you want to encrypt or decrypt a message?')
Mode = Mode.lower()
if Mode == "encrypt":
Keyword=input('Please enter the keyword you want to use:')
Message=input('Please eneter the message you wish to encrypt: ')
Keywordlength = len(Keyword)
for i in range(0, len(Message)):
Messageencrypt = Message[i]
Keywordencrypt = Keyword[Keywordcount]
if Messageencrypt.isalpha():
if Messageencrypt.isupper():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt + Keywordencrypt
if CodedMessage > 90:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
elif Messageencrypt.islower():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt + Keywordencrypt
if CodedMessage > 122:
CodedMessage = CodedMessage - 26
Encryptedletter = chr(CodedMessage)
else:
Encryptedletter = Messageencrypt
EncryptedMessage = EncryptedMessage + Encryptedletter
Keywordcount = Keywordcount + 1
if Keywordcount >= Keywordlength:
Keywordcount = 0
print(EncryptedMessage)
if Mode == "decrypt":
Keyword=input('Please enter the keyword you want to use:')
Message=input('Please eneter the message you wish to decrypt: ')
Keywordlength = len(Keyword)
for i in range(0, len(Message)):
Messageencrypt = Message[i]
Keywordencrypt = Keyword[Keywordcount]
if Messageencrypt.isalpha():
if Messageencrypt.isupper():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt - Keywordencrypt
if CodedMessage < 65:
CodedMessage = CodedMessage + 26
Encryptedletter = chr(CodedMessage)
elif Messageencrypt.islower():
Messageencrypt = ord(Messageencrypt)
Keywordencrypt = Keywordencrypt.upper()
Keywordencrypt = ord(Keywordencrypt) - 64
CodedMessage = Messageencrypt - Keywordencrypt
if CodedMessage < 97:
CodedMessage = CodedMessage + 26
Encryptedletter = chr(CodedMessage)
else:
Encryptedletter = Messageencrypt
EncryptedMessage = EncryptedMessage + Encryptedletter
Keywordcount = Keywordcount + 1
if Keywordcount >= Keywordlength:
Keywordcount = 0
print(EncryptedMessage)