TEMPEST: A Signal Problem
,i ,, "i 11 I \ I S CR 'f (b) (3) 86-36 tempest : A Signal Problem The story of the discovery of various compromising radiations from communications and Comsec equipment. In 1962, an officer assigned to a very smaJI intelligence detachment in Japan was performing the routine duty of inspecting the area around his little cryptocenter. As re<Juired, he was examining a zone 200 ft. in radius to see if there was any "'clandestine technical surveillance." Across the street, perhaps a hundred feet away, was a hospital controlled by the Japanese government. He sauntered past a kind of carport jutting out from one side of the building and, up under the eaves, noticed a peculiar thing-a carefully concealed dipole antenna, horizontaJly polarized.
,i ,, "i 11 I \ I S£CR£'f (b) (3)-P.L. 86-36 TEMPEST: A Signal Problem The story of the discovery of various compromising radiations from communications and Comsec equipment. In 1962, an officer assigned to a very smaJI intelligence
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