VCMRTD
This repository contains three Flutter packages for reading and verifying electronic travel documents (ePassports, eID cards, driving licences) and performing biometric face verification built for the Yivi ecosystem.
Packages
A Dart/Flutter library for reading Machine Readable Travel Documents (MRTDs) via NFC. Implements ICAO 9303 with BAC and PACE authentication, reads all standard data groups, and integrates with go-passport-issuer for server-side Passive Authentication and Verifiable Credential issuance.
A reusable Flutter package for capturing and recognizing Machine Readable Zones (MRZs).
It provides a camera viewfinder with framing overlay, MRZ text recognition using Google ML Kit by default, and a Tesseract4Android fallback for Android environments where an F-Droid-friendly OCR engine is preferred. It also provides check-digit correction and a manual-entry fallback.
The package depends on vcmrtd and the external mrz_parser package.
A Flutter package for face verification and liveness detection. Supports active liveness (gesture challenges) and passive liveness (anti-spoofing + rPPG heart rate), plus face matching against the DG2 photo from the NFC chip. Runs entirely on-device in a background isolate using bundled TFLite models.
An alternative face-verification engine based on the proprietary Iris SDK from passportreader.app lives in its own repository, iris-sdk-flutter, which ships the vendor binaries with the package. Unlike the on-device implementation, Iris provides its own full-screen native camera UI and returns the verification result to Flutter.
Idem (app)
idem is the app built on these packages. It runs the full flow: MRZ scanning, NFC chip reading, face verification, and Verifiable Credential issuance.
The app supports choosing between the on-device face_verification engine and the Iris engine through the advanced settings.
cd idem
flutter pub get
flutter run
Related projects
- go-passport-issuer — backend service for document verification and VC issuance
- GMRTD — Go library for MRTD operations (used by go-passport-issuer)
- Yivi — privacy-preserving identity platform
Attribution
The vcmrtd package is based on dmrtd by ZeroPass, with significant modifications and improvements by the Yivi team.
License
Copyright (C) 2025-2026 Yivi B.V.
This software is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
The full licence text is in LICENSE. The same text ships with each package: vcmrtd/LICENSE, mrz_capture/LICENSE, and face_verification/LICENSE.
Funding
This project received funding through NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet program. Learn more at the NLnet project page.
