Koustav Kumar Mondal — BlogTechnical notes and research writing on hardware security, PUFs, blockchain and quantum-era networks.https://koustav.isroot.in/PUFAnalytics, a complete guide to evaluating PUFs in the browser and in Pythonhttps://koustav.isroot.in/blog/pufanalytics-guide/https://koustav.isroot.in/blog/pufanalytics-guide/A tour of PUFAnalytics, the open-source toolkit for physically unclonable functions. It covers every view of the web app, how each metric is computed, how the browser and Python give bit-identical results, and a full reference of the Python API.Wed, 04 Nov 2026 00:00:00 GMTTechnicalPUFHardware securityPythonStatisticsWebServerless file transfer in the browser, how NebulaTransfer sends files peer to peerhttps://koustav.isroot.in/blog/serverless-file-transfer-webrtc/https://koustav.isroot.in/blog/serverless-file-transfer-webrtc/How NebulaTransfer moves files of up to 100 GB straight from one browser to another with WebRTC, a tiny transfer protocol with PIN checks and a sliding window, and IndexedDB on the receiving side.Wed, 04 Nov 2026 00:00:00 GMTTechnicalWebRTCPeer-to-peerNetworkingTypeScriptWebHow a PUF works, from silicon variation to a login protocolhttps://koustav.isroot.in/blog/how-a-puf-works/https://koustav.isroot.in/blog/how-a-puf-works/Physical unclonable functions turn manufacturing randomness into a fingerprint no one can copy. Here is how they are built, measured, made reliable and attacked, with simulations you can run.Tue, 03 Nov 2026 00:00:00 GMTResearchPUFHardware securityAuthenticationMachine learningBuild your own monitoring server with Docker, Prometheus and Grafanahttps://koustav.isroot.in/blog/docker-monitoring-server/https://koustav.isroot.in/blog/docker-monitoring-server/A complete, tested setup with Prometheus, Grafana, Node Exporter, cAdvisor, Alertmanager, Blackbox Exporter and Pushgateway, plus how to monitor your own experiments and batch jobs.Mon, 02 Nov 2026 00:00:00 GMTTechnicalMonitoringDockerPrometheusGrafanaDevOps