8.75% surely? you need at least two digits of specious precision on that non-random number.

Text written with a non-apple Bluetooth keyboard is green?

> "magic"

They're on an proprietary extension of Bluetooth, standard compatible but closed to their devices. They usually don't talk much about it, Phil Schiller was the most explicit I think (it was about the airpod's W1 but it's the same deal)

https://www.theverge.com/2016/9/7/12829190/apple-w1-chip-iph...

> Apple’s Phil Schiller described Apple’s move to a new wireless chip as “fixing the challenges” of wireless audio

On the other hand, I’d argue that it’s close enough to trivial to be considered trivial. How many embedded devices transmit sensitive information?

Now, I know that pretty much every Bluetooth based credit card reading device explicitly defends against a channel such as this, but there are tons of access control solutions, and medical devices that don’t

Would you notice a raspberry pi tucked into the mess of wires beneath the security guard guards desk?

That's less than two weeks.

Everything leaks if you stare at it long enough