Alex Y. wrote:
A maser is a focused radar that can read this signature.
Erm… no. A maser is a low-frequency laser; see
Maser - Wikipedia. You’re thinking of TEMPEST. Again,
refer to the Tempest (codename) - Wikipedia for details.
I’m also thinking of phase-conjugate mirrors, phased-array radars, RF
cages,
etc. But you are correct I have never bothered to nail down the
details…
Shred your old hard-drives, guys! (-;