caesar-cipher-tool 1.0.0

Reusable Caesar cipher module for educational purposes

Caesar Cipher Tool

A lightweight, reusable Caesar cipher library for Python.

⚠️ Security Notice
This library is for educational purposes only. It is not cryptographically secure and should not be used for sensitive data.

Installation

pip install caesar-cipher-tool

Usage

from cipher_tool import encrypt, decrypt

# Encrypt a message
ciphertext = encrypt("Hello, World!", shift=3)
print(ciphertext)  # Khoor, Zruog!

# Decrypt a message
plaintext = decrypt(ciphertext, shift=3)
print(plaintext)   # Hello, World!

Features

• Simple API: Easy-to-use encrypt/decrypt functions
• Configurable shift: Support for any shift value (0-25)
• Case preservation: Maintains uppercase and lowercase letters
• Non-alphabetic handling: Preserves punctuation, spaces, and numbers
• Lightweight: Minimal dependencies
• Extensible: Clean architecture for adding other cipher methods

API Reference

encrypt(text, shift)

Encrypts plaintext using Caesar cipher.

Parameters:

• text (str): The plaintext to encrypt
• shift (int): Number of positions to shift (0-25)

Returns: Encrypted ciphertext (str)

decrypt(text, shift)

Decrypts ciphertext using Caesar cipher.

Parameters:

• text (str): The ciphertext to decrypt
• shift (int): Number of positions to shift (0-25)

Returns: Decrypted plaintext (str)

Examples

# Basic usage
encrypt("Hello", 3)      # "Khoor"
decrypt("Khoor", 3)      # "Hello"

# Mixed case and punctuation
encrypt("Hello, World!", 13)  # "Uryyb, Jbeyq!"

# Numbers and symbols are preserved
encrypt("Test123!", 5)        # "Yjxy123!"

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.