What are the key validation checks for a threat model?

Check threats are enumerated (STRIDE per boundary-touching element), QA has reviewed it, every threat is addressed, and the mitigations are actually done right.

Validate the whole threat model:

• Are threats enumerated?
• Minimum: STRIDE per element that touches a trust boundary
• Has Test/QA reviewed the model? (Testers often find issues)
• Is each threat addressed?
• Are mitigations done right?

Do these checks BEFORE Final Security Review - shipping will be more predictable.

Why QA review matters: Testers have a different mindset - they actively try to break things and often spot threats that developers miss.