This presentation is focused on evaluating embedded technology by approaching the examination of device security through analysis of inter-chip communication at the circuit level. As more and more IoT technology improve on the communication security, we find that we can better evaluate an embedded product’s end-to-end security posture by examining the data transfer at the circuit level via inter-chip communication as data passes through an embedded device. At this circuit level, communication between microcontrollers (MCUs) are rarely encrypted; this lack of encryption of inter-chip communications can be used as an effective testing point. So, during this presentation we will be exploring inter-chip communication concepts. Focusing on mapping circuit layouts, capturing and decoding communication methodologies, and evaluation of end-to-end security concepts on IoT bridging devices used for remote Internet access to devices leveraging nonroutable Protocols. I will also be Introducing Akheron proxy. A proof of concept UART proxy tool used for capture, replay, and basic fuzzing of inter-chip serial communication.