Nearly all cryptography on MCUs is hardware based. It would have otherwise be completely impossible to do timing sensitive crypto work like WiFi, or BT. The Wi

Nearly all cryptography on MCUs is hardware based. It would have otherwise be completely impossible to do timing sensitive crypto work like WiFi, or BT. The WiFi, or BT protocol stacks themselves are however almost always in software on MCUs simply because nobody would bother making a separate ASIC IP for that which will be outdated by the next standard errata.