CrackCaesar

A minimal Flask web app to decode Caesar cipher messages into plaintext.

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🔍 What is CrackCaesar?

CrackCaesar is a lightweight web interface that takes a Caesar-encrypted message and converts it into readable plaintext using brute-force or shift-based logic.

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🚀 Features

• 🌐 Simple web UI built with Flask
• 🔓 Brute-force Caesar cipher decoding (all 25 shifts)
• ✏️ Optional: Input known shift value (if you know it)
• 📜 Clean, minimal output for readability

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🛠️ Tech Stack

• Python 3
• Flask
• HTML/CSS (minimal)

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📂 Project Structure

/CrackCaesar/
├── app.py            # Main Flask app
├── templates/
│   └── index.html    # Web frontend
└── README.md

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⚙️ How to Run Locally

1. Clone the Repo

git clone https://github.com/akash1512485/CrackCaesar
cd CrackCaesar

2. Create a Virtual Environment

python -m venv .venv
source .venv/bin/activate  # On Windows: .venv\Scripts\activate

3. Install Dependencies

pip install -r requirements.txt

4. Run the App

python app.py

Then open your browser at http://127.0.0.1:5000/.

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🧠 How It Works

• If no shift is provided: the app attempts all 25 possible Caesar shifts and shows all possible plaintexts.
• If a shift is given: it directly decrypts using that shift.

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📝 Future Improvements

• Detect English words to auto-pick most likely plaintext
• Add dark mode toggle
• Add encryption mode (reverse functionality)

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Made with 💻 by Akash Chaudhari