posted on Sep, 3 2014 @ 06:35 PM
Tin Foil hats go way back, remember the Tin woodsman in the 1939 movie the Wizard of Oz?
Of course his hat looked like something you would change the oil in your car with.
Would have been the psychological profile back then.
First time I heard about tin foil hats on the internet was in some old sci crypt posts from the late 80's.
They could have been talking about TEMPEST and the 100 DB of electrical shielding aluminum yields.
Usually cryptographers are Über Mathematicians not electrical engineers so the precise usefulness of a tin foil hat remains a mystery to me.
edit on 3-9-2014 by Cauliflower because: (no reason given)