Sigl Overview

What is Sigl?

Last updated: March 4, 2026

Sigl is a secure interaction model used to transition a display from a public state to a private state after a signed smartphone action and protocol verification.

Main Use Case

A display publishes a QR code / session reference.
A phone scans it and signs the intended action.
A gateway validates the protocol message and routes the request.
The display switches to the expected private context after checks pass.

Signed routing

Routes are validated from signed protocol inputs.

Nonce binding

Session transitions are correlated and replay-resistant.

Operational visibility

Logs and simulator flows help diagnostics and verification.

Gateway-target split

The scanned endpoint and destination service can differ.

Sigl App (iOS)

Sigl App is the companion app for scanning session QR codes and participating in SIGL flows.

Paper

Read the SIGL white paper: paper2.pdf.

Support and Contact

Laurent Fournier
laurent.fourniercalmet@gmail.com

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