The NFC challenge only takes a second and ATM like machines could probably go much quicker than that. A broader goal with ARX is to bake bounties into "licensin

The NFC challenge only takes a second and ATM like machines could probably go much quicker than that. A broader goal with ARX is to bake bounties into "licensing fees" (or accurately, manufacturing costs) for secure elements that would validate keys couldn't actually be extracted. Putting (very) public bounties at various reward tiers lets one establish something like a demand curve but for security.