Decimen Optical Transfer: fountain-coded QR file transfer
Summary
Decimen Optical Transfer demonstrates a screen-to-camera file transfer using fountain-coded QR streams to move files without an internet connection. The project provides a hosted app (decimen.app), architecture and protocol docs, and open-source tooling, achieving offline device-to-device transfers (up to about 128 KB/s) for payloads up to 64 MB. It notes that transfers are not encrypted and highlights privacy considerations.