🟢 Caesar Cipher – Hacker Style GUI

A Python GUI application for Caesar Cipher encryption and decryption, designed with a hacker / terminal-inspired interface.

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🚀 Features

• 🔐 Encrypt text using Caesar Cipher
• 🔓 Decrypt text using the same shift value
• 🔢 Supports letters (A–Z, a–z) and digits (0–9)
• 🖥️ Hacker-style GUI (black & green, CMD font)
• 🪟 Window opens centered on the screen
• ❗ Input validation with error messages

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🧠 How It Works

The Caesar Cipher shifts each character by a fixed number (shift):

• Letters are shifted within the English alphabet (26 characters)
• Digits are shifted within 0–9
• Other characters remain unchanged

Example (Shift = 3)

Input:  Hello123
Output: Khoor456

Decryption works by applying the negative shift.

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🛠️ Technologies Used

• Python 3
• tkinter (built-in GUI library)

No external dependencies required.

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📂 Project Structure

caesar-cipher-gui/
│
├── main.py
└── README.md

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▶️ How to Run

python main.py

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📌 Future Improvements

• ⌨️ Keyboard shortcuts
• 🔄 Clear output button
• 🧠 Brute-force mode (all shifts)
• 🌐 Support for more character sets

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Author: Sagiv
Focused on clean code, learning, and professional presentation.