Slide 8 · The Misconception
“It's on a popular hub with thousands of downloads — so it's safe.”
This is the single most dangerous assumption in the AI world. Kill it before Part 2.
Popularity = safety. “It's the official PyTorch nightly.”
A download count is a trust score. “40,000 people use it.”
A model card / green checkmark means it was verified.
Popular is a bigger target, not a safer one — that's exactly why attackers aim there.
Counts are trivially faked and say nothing about the code inside.
Most hubs have no strong provenance. A model card is a self-written README, not proof.
The Mindset Shift
Trust is earned through verification — signatures, hashes, provenance — not through reputation or download counts. Part 4 is entirely about how to actually verify. First, Part 2 shows you the five ways the chain gets poisoned.