13 Aug
2006
13 Aug
'06
9:07 p.m.
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:
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.