Reverse Engineering Hardware of Embedded Devices: From China to the World
This article covers some basic hardware reverse engineering techniques on PCB-level, which are applicable to any electronic embedded device to showcase how to analyze a previously unknown (to the researcher or public white-hat community) hardware device. SEC Consult operates a dedicated Hardware Security Lab as part of its SEC Consult Vulnerability Lab. The presented material is a glimpse into ongoing research at the SEC Consult Hardware Security Lab and pentests that involve hardware hacking techniques.[…]
http://blog.sec-consult.com/2017/07/reverse-engineering-hardware.html
Firmware Security 