> > And guess what. Keyboards use a serial protocol. Which means that
> > there will be slightly different voltage drops in the system varying
> > with the keys you press. ZOMG! OpenBSD provides a side channel for
> > attackers through the sensors framework!
>
> And don't forget the aps(4) sensor on Thinkpads! The accelerometer can
> probably measure the acceleration caused by various key strokes and that
> acceleration will be different depending on where on the keyboard you hit
> (different angles) and with which finger (different strength).
well, and dont' forget the physical attack angle. Between the screen
leakage perhaps being used to detect a large number of pink pixels and
the aps(4) sensor leakage could probably detect the rythmic thumping
when the laptop owner is doing some one handed laptop driving when the
other hand is occupied. An attacker could use this information to then
physically take control of the machine while the operator has both
hands busy and is vulnerable!
-Bob
