Yasir Hassan ยท Writeups https://yasirhassan.tech/writeups/ Notes on security, cryptography and the systems Yasir Hassan builds. en Building a tamper-evident land registry https://yasirhassan.tech/writeups/tamper-evident-land-registry/ https://yasirhassan.tech/writeups/tamper-evident-land-registry/ Sun, 18 Oct 2026 00:00:00 GMT How Milkiyat uses hash chaining, AES-256-GCM and RSA signatures so that any edit to a land record, even one made directly in the database, is caught. Training a fire and smoke detector for multi-camera surveillance https://yasirhassan.tech/writeups/fire-smoke-detection-yolo/ https://yasirhassan.tech/writeups/fire-smoke-detection-yolo/ Sun, 18 Oct 2026 00:00:00 GMT Notes from building the detection layer of VigiLense, my final year project: training YOLO on D-Fire, reading the metrics honestly, and turning detections into alerts people can act on.