Asynch designs

[Paul Anderson]

As I recall, when I was with NSA, we had an OCR with a "screco" circuit that
produced a random character that would interfere with receiving the true
signal. A lot of fun to work on.

Paul

On 8/12/06, Scott Quinn <compoobah at valleyimplants.com> wrote:
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> > Supposedly, non-clocked logic can also offer greater security because
> >there's no clock signal for remote sensors to key on when trying to
> >sense what the CPU is doing.   This seemed a little odd to me.  Do
> >espionage types really try to sense what a processor is doing
> >remotely, based on the EM emissions from the chip?
>
> Don't know about processors, but Tempest had a proof of concept for
> intercepting I/O from kbd/video.
> (Anyone else remember Tempest? for a while they were selling big "tinfoil
> hat" type shields for monitors and then, suddenly,
> it went away.) Was that NSA that came up with the POC?
>
> P.S. - for the U.S. types - never would have thought it 15 years ago, but
> NSA now has official mousepads you can buy.
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