Python implementation of the classic Caesar cipher encryption algorithm.
- Encrypt text with custom shift value
- Decrypt encrypted messages
- Supports both uppercase and lowercase letters
- Validates shift parameter (1-25)
from caesar_cipher import encrypt
text = "Hello World"
encrypted = encrypt(text, 13)
print(encrypted) # "Uryyb Jbeyq"from caesar_cipher import decrypt
encrypted_text = "Uryyb Jbeyq"
decrypted = decrypt(encrypted_text, 13)
print(decrypted) # "Hello World"The program includes an example that decrypts:
"Pbhentr vf sbhaq va hayvxryl cynprf."
Using ROT13 (shift of 13) to reveal the hidden message.
- Python 3.x
- String manipulation
str.maketrans()andtranslate()methods
The Caesar cipher shifts each letter in the alphabet by a fixed number of positions. For example, with a shift of 3:
- A → D
- B → E
- C → F