Tempest Specification

[glass%mica.Berkeley.EDU at ucbvax.berkeley.edu]

I've been asked to write an essay on the Tempest specification -- a
document which describes ways to make computer systems less susceptible to
snooping by listening to their radiated electric and magnetic fields. I
know that Sun and Zenith make computers that conform to Tempest, and am in
the process of contacting these companies; however, I need more general
info on the sorts of things a manufacturer must do to meet the spec --
and, if possible, a copy of the spec itself.

If you have pointers to information on this subject, please send e-mail.
Any and all suggestions of sources would be MUCH appreciated.