CipherCalc

Live Demo: https://amadene12-art.github.io/ciphercalc/

CipherCalc is a web application for working with classical encryption algorithms. The project demonstrates cryptographic concepts through a simple and interactive interface.

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Why this project?

This project was created to:

• demonstrate understanding of classical cryptography
• practice working with text processing and algorithms
• build an interactive frontend application without frameworks

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Features

• Text encryption and decryption

• Support for Latin and Cyrillic alphabets (including "ё")

• Case preservation

• Multiple algorithms:

  • Caesar cipher
  • Polybius square
  • Vigenère cipher
  • Atbash cipher

• Caesar bruteforce (shift analysis)

• User-friendly interface:

  • toast notifications
  • responsive layout
  • dropdown navigation
  • mode switching

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Implementation Details

• Pure JavaScript (no libraries)

• Universal text handling:

  • Latin → 26 characters
  • Cyrillic → 33 characters

• Shift normalization using modulo

• Supports mixed text (EN + RU)

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Tech Stack

• HTML5
• CSS3 (custom properties, responsive design)
• JavaScript (Vanilla JS)

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📂 Project Structure

index.html        — main page
caesar.html       — Caesar cipher
polybius.html     — Polybius square
vigenere.html     — Vigenère cipher
atbash.html       — Atbash cipher
about.html        — project info
contact.html      — contact form
style.css         — styles
js-app.js         — application logic

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Usage

1. Select an algorithm
2. Enter text
3. Set parameters (shift or key)
4. Get instant result

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📸 Screenshots

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⚙️ Getting Started

No build required.

Simply open index.html in your browser.

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📌 Future Improvements

• Automatic language detection
• Frequency analysis for Caesar cipher
• Operation history
• More encryption algorithms

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👤 Author

Ivan Bakaldin Frontend Developer | Applied Informatics Student