UPDATE - mine fault. CPU doesn't have AES instructions!

Actually it is.

For example some RPi CPUs have AES acceleration instructions built similar as AES-NI on x86. But due firmware limit we can't use them.

Probably it's licensing and pricing issue...

I looked it up. That's not true. The hardware isn't there, and would require the RPi foundation purchase a license to implement.

See the engineer reply in this thread:

https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=2078...

> That is licence for the HW, so you buy it then add the requisite HW to the die, so no, it cannot be added later without redeisgning the HW, which would cost about $1M Plus the licence....

Can't edit my own post, but please stop downvoting mobilio. They admitted they were wrong, and there's no shame in that.

Even if they had been wrong, they shouldn't necessarily have been downvoted, because it still ended up adding to the discussion.

It's an export law issue. Raspberry Pi is an educational product that should be exportable all around the world. They can't let crypto regulation laws upend that goal.