[ntp:questions] Strange NTP problem on AMD Geode LX cards.
David Woolley
david at ex.djwhome.demon.invalid
Wed Oct 14 06:58:20 UTC 2009
Unruh wrote:
>> Rick Jones wrote:
>> For anyone that cared enough about emissions, (and not about price)
>> they could always get a EMSEC / TEMPEST, Level A / 1, PC.
>
> In one case to make it so that it does not destroy other people's enjoyment of
> their system, and the other to make sure a determined adversary cannot make use of
> yours. Different boxes for different folks.
Tempest is about making sure that insufficient radiation exists to be
able to recover a useful signal. Normal PC screening is to prevent
sufficient noise from escaping to cause problems to others. If you can
recover useful information above the background noise, the machine is
definitely compromising any nearby receivers.
Tempest isn't about stopping people accessing your computer, although
normal EMC screening is, in part, about stopping local radio
transmitters upsetting the machine.
More information about the questions
mailing list