[cryptography] Preserve us from poorly described/implemented crypto

Nico Williams nico at cryptonector.com
Tue Jun 7 15:15:00 EDT 2011


On Tue, Jun 7, 2011 at 2:01 PM, J.A. Terranson <measl at mfn.org> wrote:
> On Tue, 7 Jun 2011, Nico Williams wrote:
>> TEMPEST.
>>
>> I'd like keyboards with counter-measures (emanation of noise clicks)
>> or shielding to be on the market, and built-in for laptops.
>
> Remember how well the original IBM PC "clicky keyboard" went over (I think
> I'm the only person in the US who actually liked it - veryone gave me
> theirs after "upgrading to the newer lightweight and silent ones): the
> user experience will always end up with a back seat when it's time to do
> the actual work in front of the screen.

Right, I want my ergo, so it can't just be a tank of a keyboard.

>> I wonder whether touch-screen smartphones give off any useful RF
>> emanations regarding touches, drags, screen contents.
>
> I haven't done a lot of serious work there, but I did look once at an LG
> Optimus V out of idle curiosity: I don't think it would be very difficult
> to map many of it's leaky signals.  Same for all smartphones in general.

My expectation is that smartphones leak plenty -- probably not enough
to interfere with avionics, but enough that folks nearby could capture
inputs, and probably outputs as well.

Nico
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