On: NSA posters from the 50s and 60s [pdf]

[rootw0rm]

what on earth is with the black telephone hanging by a noose? some of these are pretty interesting.

[user982 → rootw0rm]

"Hang up the phone."

[madaxe_again → user982]

Spot the person who spent their childhood watching https://en.m.wikipedia.org/wiki/Catchphrase_(UK_game_show)

[CapitalistCartr → rootw0rm]

That's the normal phone everyone used. Today, it would be a mobile. And talking about classified info, or even unclassified, but related stuff, was tantamount to sending out a broadcast

[momzer → rootw0rm]

Something along the lines of "careful what you say over unsecured phone lines, as it may come back and hang you".