- TCB:
- Trusted Computing Base
[…] is the entire complement of protection mechanisms within a computer system (including hardware, firmware, and software) that’s responsible for enforcing a security policy. A security perimeter is the boundary that separates the TCB from the rest of the system.
https://www.dummies.com/article/academics-the-arts/study-skills-test-prep/cissp/trusted-computing-base-225540/