Protection against TEMPEST?

[coderman]

On Wed, Jul 15, 2009 at 7:16 AM, Sarad AV<jtrjtrjtr2001 at yahoo.com> wrote:
> hi,
>
> I came across this link through this months Cryptogram.
> http://oculislabs.com/Products/ChameleonP.htm
> ... it prevents TEMPEST?

display emanations are just a small subset of emsec interest,
particularly in a networked environment.

in any case, display obfuscation based on gaze / focal tracking can be
defeated with additional effort.
(will it cost more to attack? yes. is this cost reasonable, maybe -
depends on threat model, etc, etc.)

there are similar techniques based on altering the font rendering
behavior on LCD displays and various types of hardware / software
setups...

best regards,