Comment by g-b-r

Are hashes of the data ever used in known chip debugging features?

Since they're supposed to be disabled in production, what would be their point?

I'm no electronic engineer, but isn't it best for them to be fast and simple, to reduce the chance that they cause interference themselves..?

And isn't it strongly unlikely that an attacker in the supply chain (TSMC??) would be able to reliably plant this in all Apple chips from the A12 to the A16 and the M1 ??