Hybrid Caesar-Polybius Cipher

A Web-Based Cryptography Tool

---

Project Description

The Hybrid Caesar-Polybius Cipher is a cryptographic system that combines two classical encryption methods: the Caesar cipher and the Polybius square cipher. This hybrid approach enhances security through a two-step encryption process, making it more resilient to basic cryptanalysis techniques.

The project provides a user-friendly, web-based tool where users can:

• Encrypt messages with customizable parameters.
• Decrypt encrypted text back to its original form.
• Experiment with classical cryptography in a modern and interactive context.

This tool demonstrates the enduring relevance of classical cryptographic techniques and their integration into modern systems.

---

Features

• Caesar Cipher: Shift each letter of the plaintext by a specified number of positions in the alphabet.
• Polybius Square Cipher: Substitute plaintext letters using a grid, which can be customized with a keyword.
• Hybrid Encryption: Combine the two ciphers for enhanced security.
• User-Friendly Interface: A simple and interactive web-based interface for easy use.

---

How It Works

Encryption

1. Input a message.
2. Specify the Caesar shift value (e.g., 3).
3. Provide a Polybius square keyword (e.g., CIPHER).
4. Click Encrypt to generate the hybrid-encrypted message.

Decryption

1. Input the encrypted message.
2. Use the same Caesar shift and Polybius keyword used for encryption.
3. Click Decrypt to retrieve the original message.

---

Live Demo

Try the Hybrid Caesar-Polybius Cipher tool online:
👉 Hybrid Caesar-Polybius Cipher

---

Technologies Used

• Frontend: HTML, CSS, JavaScript
• Backend: Flask
• Deployment: Vercel

---

Getting Started

Prerequisites

Ensure you have the following installed:

• Python 3.7 or higher
• Flask

Installation

1. Clone the repository:

   git clone https://github.com/your-username/hybrid-caesar-polybius-cipher-application.git

Hybrid Caesar-Polybius Cipher

A Web-Based Cryptography Tool

---

Project Description

The Hybrid Caesar-Polybius Cipher is a cryptographic system that combines two classical encryption methods: the Caesar cipher and the Polybius square cipher. This hybrid approach enhances security through a two-step encryption process, making it more resilient to basic cryptanalysis techniques.

The project provides a user-friendly, web-based tool where users can:

• Encrypt messages with customizable parameters.
• Decrypt encrypted text back to its original form.
• Experiment with classical cryptography in a modern and interactive context.

This tool demonstrates the enduring relevance of classical cryptographic techniques and their integration into modern systems.

---

Features

• Caesar Cipher: Shift each letter of the plaintext by a specified number of positions in the alphabet.
• Polybius Square Cipher: Substitute plaintext letters using a grid, which can be customized with a keyword.
• Hybrid Encryption: Combine the two ciphers for enhanced security.
• User-Friendly Interface: A simple and interactive web-based interface for easy use.

---

How It Works

Encryption

1. Input a message.
2. Specify the Caesar shift value (e.g., 3).
3. Provide a Polybius square keyword (e.g., CIPHER).
4. Click Encrypt to generate the hybrid-encrypted message.

Decryption

1. Input the encrypted message.
2. Use the same Caesar shift and Polybius keyword used for encryption.
3. Click Decrypt to retrieve the original message.

---

Live Demo

Try the Hybrid Caesar-Polybius Cipher tool online:
👉 Hybrid Caesar-Polybius Cipher

---

Technologies Used

• Frontend: HTML, CSS, JavaScript
• Backend: Flask
• Deployment: Vercel

---

Getting Started

Prerequisites

Ensure you have the following installed:

• Python 3.7 or higher
• Flask

Installation

1. Clone the repository:

   git clone https://github.com/your-username/hybrid-caesar-polybius-cipher.git

Hybrid Caesar-Polybius Cipher

A Web-Based Cryptography Tool

---

Project Description

The Hybrid Caesar-Polybius Cipher is a cryptographic system that combines two classical encryption methods: the Caesar cipher and the Polybius square cipher. This hybrid approach enhances security through a two-step encryption process, making it more resilient to basic cryptanalysis techniques.

The project provides a user-friendly, web-based tool where users can:

• Encrypt messages with customizable parameters.
• Decrypt encrypted text back to its original form.
• Experiment with classical cryptography in a modern and interactive context.

This tool demonstrates the enduring relevance of classical cryptographic techniques and their integration into modern systems.

---

Features

• Caesar Cipher: Shift each letter of the plaintext by a specified number of positions in the alphabet.
• Polybius Square Cipher: Substitute plaintext letters using a grid, which can be customized with a keyword.
• Hybrid Encryption: Combine the two ciphers for enhanced security.
• User-Friendly Interface: A simple and interactive web-based interface for easy use.

---

How It Works

Encryption

1. Input a message.
2. Specify the Caesar shift value (e.g., 3).
3. Provide a Polybius square keyword (e.g., CIPHER).
4. Click Encrypt to generate the hybrid-encrypted message.

Decryption

1. Input the encrypted message.
2. Use the same Caesar shift and Polybius keyword used for encryption.
3. Click Decrypt to retrieve the original message.

---

Live Demo

Try the Hybrid Caesar-Polybius Cipher tool online:
👉 Hybrid Caesar-Polybius Cipher

---

Technologies Used

• Frontend: HTML, CSS, JavaScript
• Backend: Flask
• Deployment: Vercel

---

Getting Started

Prerequisites

Ensure you have the following installed:

• Python 3.7 or higher
• Flask

Installation

1. Clone the repository:

   git clone https://github.com/your-username/hybrid-caesar-polybius-cipher.git

Thanks for clarifying! Here’s the updated README with the correct instructions for setting up and running the Flask application:

# Hybrid Caesar-Polybius Cipher  
A Web-Based Cryptography Tool  

---

## Project Description  
The **Hybrid Caesar-Polybius Cipher** is a cryptographic system that combines two classical encryption methods: the Caesar cipher and the Polybius square cipher. This hybrid approach enhances security through a two-step encryption process, making it more resilient to basic cryptanalysis techniques.  

The project provides a user-friendly, web-based tool where users can:  
- Encrypt messages with customizable parameters.  
- Decrypt encrypted text back to its original form.  
- Experiment with classical cryptography in a modern and interactive context.  

This tool demonstrates the enduring relevance of classical cryptographic techniques and their integration into modern systems.  

---

## Features  
- **Caesar Cipher**: Shift each letter of the plaintext by a specified number of positions in the alphabet.  
- **Polybius Square Cipher**: Substitute plaintext letters using a grid, which can be customized with a keyword.  
- **Hybrid Encryption**: Combine the two ciphers for enhanced security.  
- **User-Friendly Interface**: A simple and interactive web-based interface for easy use.  

---

## How It Works  
### Encryption  
1. Input a message.  
2. Specify the Caesar shift value (e.g., `3`).  
3. Provide a Polybius square keyword (e.g., `CIPHER`).  
4. Click **Encrypt** to generate the hybrid-encrypted message.  

### Decryption  
1. Input the encrypted message.  
2. Use the same Caesar shift and Polybius keyword used for encryption.  
3. Click **Decrypt** to retrieve the original message.  

---

## Live Demo  
Try the Hybrid Caesar-Polybius Cipher tool online:  
👉 [Hybrid Caesar-Polybius Cipher](https://hybrid-caesar-polybius-cipher.vercel.app/)  

---

## Technologies Used  
- **Frontend**: HTML, CSS, JavaScript  
- **Backend**: Flask  
- **Deployment**: Vercel  

---

## Getting Started  
### Prerequisites  
Ensure you have the following installed:  
- Python 3.7 or higher  
- Flask  

### Installation  
1. Clone the repository:  
   ```bash
   git clone https://github.com/your-username/hybrid-caesar-polybius-cipher.git

2. Navigate to the project directory:

   cd hybrid-caesar-polybius-cipher

3. Create and activate a virtual environment:

   # On Windows
   python -m venv venv
   venv\Scripts\activate
   
   # On macOS/Linux
   python3 -m venv venv
   source venv/bin/activate

4. Install the required dependencies:

   pip install -r requirements.txt

Running the Application

1. Start the Flask development server:

   flask run

2. Open your web browser and navigate to:

   http://127.0.0.1:5000/
   

---

Contributing

Contributions are welcome! If you have suggestions for improvements or additional features, feel free to:

1. Fork the repository.
2. Create a new branch:

   git checkout -b feature-branch

3. Commit your changes:

   git commit -m "Add new feature"

4. Push to the branch:

   git push origin feature-branch

5. Create a pull request.

---

License

This project is licensed under the MIT License. See the LICENSE file for details.

---

Acknowledgments

• The concept of hybrid cryptography inspired by classical encryption techniques.
• Thanks to the open-source community for providing valuable resources.