Raytheon sells a few products with different firmware security features: Trusted Boot, Secure Boot, and Measured Boot. Their EA-TB whitepaper was just revised, ACAICT.
EA-TB offers an integral solution for cyber resiliency and technology protection. The EA Trusted Boot Solution EA-TB is a hardware-based foundation for ensuring secure boot and runtime integrity for commercial off-the-shelf (COTS) processors such as Intel-, ARM- and PowerPC-based systems. EA-TB defends against boot-level attacks and kernel/application modification, and protects against attackers gaining persistence on a system. It can also be deployed with Electronic Armor Operating System (EA-OS).[…]
Warning: first URL is a PDF which includes SPACEs in the filename. Ugh. Why didn’t W3C do more to discourage this sort of behavior?
Click to access 4500615_RIS_Electronic%20Armor%20Trusted%20Boot_v13.pdf
https://www.raytheonintelligenceandspace.com/capabilities/products/electronic-armor
https://www.raytheonintelligenceandspace.com/news/feature/get-bus
see-also: Boot Shield
https://www.raytheonintelligenceandspace.com/capabilities/products/boot-shield
https://www.raytheonintelligenceandspace.com/news/feature/fighting-hardware-hack
also-see-also: CounterVail
https://www.raytheonintelligenceandspace.com/capabilities/products/countervail
Firmware Security 