Title
Python Caesar Cipher
Description
This Python program implements the Caesar Cipher algorithm, a classic technique for shifting letters in a message for basic encryption and decryption. Users can input a message and a shift value to perform these operations.
Caesar Cipher
The Caesar Cipher is a simple yet historical encryption method that shifts each letter in a message by a certain number of positions (the shift value) along the alphabet. For instance, with a shift value of 3, "hello" becomes "khoor." While a valuable learning tool for cryptography concepts, Caesar Cipher is not secure for real-world use due to its ease of decryption.
How to Use
-
Save this code as a Python file (e.g.,
caesar_cipher.py). -
Run the script from your terminal:
python caesar_cipher.py
-
The program will prompt you to enter a message and a shift value. Enter your desired values and press Enter.
-
The program will display the encrypted or decrypted message based on your selection.
Example Usage
Enter the message: hello world
Enter the shift value: 3
Encrypted message: khoor zruog
Enter the message: khoor zruog
Enter the shift value: -3
Decrypted message: hello world
Disclaimer
The Caesar Cipher is a weak encryption method and should not be used for sensitive information. Modern encryption techniques offer much stronger security guarantees.
License
This project is licensed under the MIT License.
Feel free to use this code for educational purposes!
Additional Notes
- This implementation handles uppercase and lowercase letters appropriately.
- It preserves non-alphabetic characters in the message.