def encrypt(text, key):
random.seed(key)
table = list(alphabet)
random.shuffle(table)
ciphertext = ''
for c in text:
i = alphabet.index(c)
ciphertext += table[i]
return ciphertext
def encrypt(text, key):
ciphertext = ''
for c in text:
i = alphabet.index(c)
ciphertext += alphabet[(i + key) % len(alphabet)]
return ciphertext
def decrypt(text, key):
plaintext = ''
for c in text:
i = alphabet.index(c)
plaintext += alphabet[i - key]
return plaintext
