mirea-projects/Second term/Algorithms/5/3.py
2024-09-24 02:22:33 +03:00

34 lines
990 B
Python
Executable File

from string import ascii_lowercase
def substitution_cipher(alphabet: str, replacement_alphabet: str, message: str) -> str:
new_message = ""
for char in message:
is_upper = char.isupper()
char = char.lower()
if char not in alphabet:
new_message += char
continue
new_char = replacement_alphabet[alphabet.find(char)]
new_message += new_char.upper() if is_upper else new_char
return new_message
def main() -> None:
input_message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
alphabet = ascii_lowercase
replacement_alphabet = "goydsipeluavcrjwxznhbqftmk"
encrypted_message = substitution_cipher(alphabet, replacement_alphabet, input_message)
print("Encrypted message:", encrypted_message)
decrypted_message = substitution_cipher(replacement_alphabet, alphabet, encrypted_message)
print("Decrypted message:", decrypted_message)
if __name__ == "__main__":
main()