The latest articles on DEV Community by Nitin dubey (@nitin_dubey_c80723fdab031). https://dev.to/nitin_dubey_c80723fdab031 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4222895%2Fc95352dd-5c88-4d24-9ff5-7f0a781eb97f.jpg https://dev.to/nitin_dubey_c80723fdab031 en Nitin dubey Mon, 02 Nov 2026 18:11:47 +0000 https://dev.to/nitin_dubey_c80723fdab031/how-we-built-prezscan-free-hardware-free-biometric-attendance-for-indian-universities-3mcl https://dev.to/nitin_dubey_c80723fdab031/how-we-built-prezscan-free-hardware-free-biometric-attendance-for-indian-universities-3mcl <p>Every morning across engineering colleges and universities in India, hundreds of people line up in front of wall-mounted fingerprint machines that break down and cause morning delays.</p> <p>To solve this, we built <strong>PrezScan</strong> (<a href="https://prezscan.onrender.com" rel="noopener noreferrer">https://prezscan.onrender.com</a>) — an independent, 100% free, hardware-free smart attendance web app engineered specifically for Indian higher-education campuses.</p> <h3> Why PrezScan is Built for Colleges: </h3> <ol> <li><p><strong>Dual-Lock Anti-Proxy Attendance</strong>:<br> Enforces a physical double-lock combining on-device 68-point AI facial recognition with academic building Wi-Fi subnet (CIDR) geofencing. Marking attendance outside the campus building or buddy-punching is physically impossible.</p></li> <li><p><strong>Sub-200ms Verification</strong>:<br> Runs client-side directly in the browser engine using WebGL GPU acceleration.</p></li> <li><p><strong>100% Privacy by Design (DPDP Act 2023 Compliant)</strong>:<br> Raw face photos are never sent over the internet or stored on servers; only local 128-dimensional mathematical vector embeddings are evaluated.</p></li> <li><p><strong>1-Click Audited Excel Reports</strong>:<br> Monthly attendance ledgers export complete timestamps and session hours instantly in formatted spreadsheets.</p></li> </ol> <p>• Live Web Application: <a href="https://prezscan.onrender.com" rel="noopener noreferrer">https://prezscan.onrender.com</a><br><br> • Source Code &amp; Documentation: <a href="https://github.com/Nitin091307/attendanceforu" rel="noopener noreferrer">https://github.com/Nitin091307/attendanceforu</a></p> ai attendance opensource webdev