Encryption Program (OOP and Tkinter)

Overview

This project is an encryption program built using Object-Oriented Programming (OOP) principles and the Tkinter library for the graphical user interface (GUI). The program allows users to encrypt and decrypt messages using various classical encryption algorithms.

Features

• User-friendly GUI with real-time input validation
• Multiple Encryption Algorithms:
  • Caesar Cipher: Simple substitution cipher that shifts letters by a specified amount
  • Vernam Cipher: A stream cipher that uses a key of the same length as the plaintext
  • Vigenère Cipher: A polyalphabetic substitution cipher using a keyword
• Real-time Validation: Input fields are validated as you type with visual feedback
• Frequency Analysis: Analyze character frequency differences between input and output
• Error Handling: Clear error messages and input validation prevent invalid operations

Requirements

• Python 3.x
• Tkinter (usually included with Python)
• Matplotlib (for frequency analysis)

Installation

1. Clone the repository:

   git clone https://github.com/yourusername/encryption-program.git
   cd encryption-program

2. Install required packages:

   pip install -r requirements.txt

Usage

1. Start the program:

   python main.py

2. Using the Interface:

   • Select an encryption algorithm (Caesar, Vernam, or Vigenère)
   • Choose between Encrypt or Decrypt operation
   • Enter your text in the plaintext field
   • Provide the required key or shift value:
     • Caesar: Enter a numerical shift value
     • Vernam: Enter a key of the same length as the input text
     • Vigenère: Enter any length key
   • Click "Submit" to perform the operation
   • Use "Frequency Analysis" to visualize character frequency changes
   • Access "Encryption Info" for algorithm descriptions

3. Input Requirements:

   • Caesar Cipher: Requires a numerical shift value
   • Vernam Cipher: Key must match plaintext length exactly
   • Vigenère Cipher: Requires any non-empty key

Error Handling

The program includes comprehensive error handling:

• Invalid inputs are highlighted in red
• Error messages appear below the relevant input fields
• The Submit button is disabled until all inputs are valid

Development

Built using:

• Python's OOP features for encapsulation and modularity
• Tkinter for the GUI implementation
• Matplotlib for frequency analysis visualization

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Contact

For any questions or suggestions, please contact [your email address].