How to Implement a QR Code Authentication System: Scan to Login

QR codes for "mobile-to-web QR code authentication." This authentication technique uses an already authenticated mobile app to authenticate the web app without the need to follow the same login process. We'll show you how to implement QR code authentication using JavaScript and a few frameworks.

QR codes are digital scannable images that can be used to store and retrieve data. In this article, we'll be using QR codes for "mobile-to-web QR code authentication." This authentication technique uses an already authenticated mobile app to authenticate the web app without the need to follow the same login process. This approach is necessary for faster and more secure authentication.

Some good examples of applications that use mobile-to-web QR code authentication are WhatsApp and WhatsApp Web. In this post, we'll show you how to implement QR code authentication using JavaScript and a few frameworks.

How Mobile-to-Web QR Code Authentication Works

The working principle of mobile-to-web QR code authentication is quite straightforward.