This document shall be used to evaluate the components of an IoT Service from the IoT Endpoint Device perspective. An Endpoint, from an IoT perspective, is a physical computing device that performs a function or task as a part of an Internet connected product or service. An Endpoint, for example, could be a wearable fitness device, an industrial control system, an automotive telematics unit or even a personal drone unit. All technologies used to drive the physical device shall be evaluated for security risks. The result is a practical set of design guidelines that allow the reader to identify and remediate almost all potential risks to the IoT service.