🔐 Custom Atbash-Inspired Cipher (JavaScript)

This project is a simple implementation of a custom text cipher built in vanilla JavaScript. It’s loosely inspired by the classic Atbash cipher, but with a personalized twist.

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✨ Features

• Encrypts lowercase letters using reversed halves of the alphabet:
  • a–m → reversed as m–a
  • n–z → reversed as z–n
• Leaves non-alphabet characters (spaces, punctuation, numbers) unchanged
• Minimal logic, beginner-friendly, no external libraries
• Console-based interaction using prompt() and console.log()

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🧠 How It Works

1. You enter a message via a prompt.
2. Each character is checked:
   • If it's in the first half of the alphabet (a–m), it's replaced by its mirror in that half.
   • If it's in the second half (n–z), it's replaced by its mirror in that half.
   • Any other character (space, punctuation, etc.) is preserved.
3. The result is printed to the console.

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🧪 Example

Input: Hello, World! Output: svool, dliow!

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🚀 Usage

1. Clone the repo or copy the code from script.js
2. Open the file in your browser or use a live JavaScript environment
3. You’ll be prompted to enter a message
4. The encrypted message will be logged in the console

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📌 Possible Improvements

• Add decryption (this cipher is symmetric)
• Support uppercase letters
• Build a UI for web-based encryption
• Host as a playground on Vercel or Netlify
• Turn it into a mini NPM package

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🤝 Contributing

Pull requests and suggestions are welcome!
If you have ideas for improving or extending this cipher, feel free to open an issue or submit a PR.

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🛡 License

This project is licensed under the MIT License.

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👋 Author

Henry Odunsi
Frontend Developer | Builder | Problem Solver
LinkedIn • Portfolio

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