DIGITAL SIGNER

A lightweight web application for digitally signing images using RSA cryptography. It supports drag-and-drop uploads, key generation, signature export/import, signature verification, and embedding signatures into PNG image metadata.

Features

• Minimalistic dark UI with drag-and-drop support
• RSA key pair generation (2048-bit)
• Digital signature creation and verification
• Export/import public keys and signatures
• Embed signature into PNG image metadata
• Purely client-side, privacy-focused

Live Demo

Try it here

What I Learned

• Implementing cryptographic operations in the browser with the Web Crypto API
• Creating a responsive and accessible drag-and-drop interface
• Exporting and importing keys and binary data
• Embedding custom data into PNG images using metadata chunks
• Designing a sleek, elegant UI with a designer’s mindset

How to Run Locally

git clone https://github.com/Notnaut77/digital-signer.git
cd digital-signer
open index.html