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MonoAlphaCipher.py
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MonoAlphaCipher.py
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import random
alphabet = 'abcdefghijklmnopqrstuvwxyz'
key = list(alphabet)
random.shuffle(key)
key = ''.join(key)
def encrypt(plaintext):
ciphertext = ''
for letter in plaintext:
if letter.lower() in alphabet:
index = alphabet.index(letter.lower())
print(index)
if letter.isupper():
ciphertext += key[index].upper()
else:
ciphertext += key[index]
else:
ciphertext += letter
return ciphertext
def decrypt(ciphertext):
plaintext = ''
for letter in ciphertext:
if letter.lower() in alphabet:
index = key.index(letter.lower())
if letter.isupper():
plaintext += alphabet[index].upper()
else:
plaintext += alphabet[index]
else:
plaintext += letter
return plaintext
plaintext = input("Enter the plaintext message: ")
ciphertext = encrypt(plaintext)
print("Message will sent: "+ciphertext)
decrypted_text = decrypt(ciphertext)
print("Message will get: "+decrypted_text)