An Interface between Legacy and Modern Mobile Devices for Digital Identity

TL;DR

This paper introduces a novel, open-source interface enabling legacy mobile devices to display QR code credentials, thereby expanding access to modern digital identity solutions in developing regions.

Contribution

The paper presents a new interface compatible with legacy devices for displaying QR code credentials, bridging the gap between modern identity platforms and low-cost mobile devices.

Findings

Open-source implementation available for public use

Enables legacy devices to display standard QR codes

Facilitates access to digital identity in developing regions

Abstract

In developing regions a substantial number of users rely on legacy and ultra-low-cost mobile devices. Unfortunately, many of these devices are not equipped to run the standard authentication or identity apps that are available for smartphones. Increasingly, apps that display Quick Response (QR) codes are being used to communicate personal credentials (e.g., Covid-19 vaccination certificates). This paper describes a novel interface for QR code credentials that is compatible with legacy mobile devices. Our solution, which we have released under open source licensing, allows Web Application Enabled legacy mobile devices to load and display standard QR codes. This technique makes modern identity platforms available to previously excluded and economically disadvantaged populations.