- RoT :
- Root of Trust
[…] are highly reliable hardware, firmware, and software components that perform specific, critical security functions. Because roots of trust are inherently trusted, they must be secure by design. As such, many roots of trust are implemented in hardware so that malware cannot tamper with the functions they provide. Roots of trust provide a firm foundation from which to build security and trust.
https://csrc.nist.gov/Projects/Hardware-Roots-of-Trust