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Explore Azure Sphere's innovative approach to securing connected microcontroller devices with limited resources in this 41-minute conference talk by Ryan Fairfax from Microsoft. Dive into the customized Linux kernel and its security components, including a custom Linux Security Module, kernel modifications, and user space elements that form the OS's security backbone. Learn about the challenges of implementing modern security techniques in resource-constrained environments, and gain insights from the development team's experiences, including false starts and failed attempts. Discover how Azure Sphere achieves robust security within a highly constrained 4 MiB RAM footprint, offering valuable lessons for developers working on IoT and embedded systems security.