Caesar Cipher Tool

A simple command-line tool written in Python for encrypting and decrypting text using the classic Caesar Cipher algorithm.

Features

• Encrypt plaintext by shifting letters by a user-defined number.
• Decrypt ciphertext back to the original text using the same shift.
• Input validation to ensure the shift is a valid integer.
• User-friendly command-line interface with options to encrypt, decrypt, or exit.

Getting Started

Prerequisites

• Python 3.x installed on your system.

Installation

1. Clone the repository or download the source code.

git clone https://github.com:Hamidkarimi-h/caeser-cipher-tool.git
cd caesar-cipher-tool

2. No external dependencies are required.

Usage

Run the main program:

python main.py

Follow the on-screen instructions to:

• Choose to encrypt or decrypt.
• Enter the text.
• Enter the shift amount.

Example

=== Caesar Cipher Tool ===

Choose your option:
    1) Encrypt
    2) Decrypt
    3) Exit
Your choice: 1
Enter the text to encrypt: Hello World!
Enter the shift amount (integer): 3
Encrypted text: Khoor Zruog!
----------------------------------------

Project Structure

caesar-cipher-tool/
│
├── main.py         # Main program with CLI interface
├── caesar.py       # Caesar cipher encryption and decryption logic
└── README.md       # Project documentation

License

This project is licensed under the MIT License.

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