Dev Tools · 2h ago
Dev builds QR-paired browser handoff tool with E2E encryption
A developer created a browser handoff tool that uses QR codes to pair devices for live text and file transfers without accounts or cloud storage. The tool employs browser-generated ECDH keys and AES-GCM encryption, with pairing IDs that serve as rendezvous handles rather than secrets. The project prioritizes a simple mental model over flexibility, avoiding public links and stored queues.
Meridian48 take
The technical choices—especially separating encryption contexts for text and files—are more interesting than the tool itself, offering a template for privacy-conscious peer-to-peer data transfer.
qr-pairingend-to-end-encryption