[HECnet] VMS/RSX Guest accounts

[Paul Koning]

> On Apr 23, 2020, at 8:01 PM, William Pechter <pechter at gmail.com> wrote:
> 
> Actually the fun mil-spec VT100 was the Tempest VT100.  Metal case to avoid radiating information into the air and a metal cased VT100 keyboard.
> 
> Dropped that in my lap only ONCE at the FBI facility I was Field Service for. Ugh.
> 
> bill

One of the strangest crypto / security papers I ever read was from famous cryptologists in England, who designed a font that dramatically cuts emissions from a video monitor.  You could pretty much get TEMPEST compliance simply by downloading that font and using it for your text instead of the stock font.  The magic, as I recall, was soft edges, so the square waveforms typical of a text video signal were smoothed.

	paul