I want to know the answer to the following question:
What can hardware be a source of?
All the background I'm provided with is that "Using devices and methods such as dongles, trusted platform modules, intrusion-aware cases, drive locks, disabling USB ports, and mobile-enabled access may be considered more secure due to the physical access (or sophisticated backdoor access) required in order to be compromised.". Is that enough to answer the question?
Answer: no