The QR Code Wasn't Enough: How I Added Device-Bound Authentication

How I added another layer of verification to make account sharing and proxy attendance harder. The Problem In my previous article, I explained how I used dynamic QR authentication to reduce one of the simplest forms of proxy attendance: screenshot and share the QR code. But that introduced another question. What if the student shares their account instead? Consider this scenario: Classroom Student A │ └── Has valid account + trusted device Hostel Student B │ └── Gets Student A's credentials │…