The database architecture behind students, meetings, attendance, authentication, and controlling unnecessary Firestore reads. How I Structured My Firestore Data Model for an Anti-Proxy Attendance System When I began building my attendance system, ...

How one more question about proxy attendance pushed me to add another layer of trust to my attendance system. The QR Code Was Already Dynamic When I started building my anti-proxy attendance system, I knew a normal QR code wasn't enough. If a tea...

How one more question about proxy attendance pushed me to add another layer of trust to my attendance system. The QR Code Was Already Dynamic When I started building my anti-proxy attendance system, I knew a normal QR code wasn't enough. If a tea...

"Anyone can generate a QR code. Designing one that actually prevents misuse is the hard part." When people hear "QR-based attendance," the first question is usually: "Can't someone just take a photo of the QR code and send it to their friend?" The...