Declassified NSA Document Which Reveals the Story Behind the Discovery of TEMPEST

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The NSA recently declassified a document which revels the story behind how the United States first discovered the security threat of TEMPEST. TEMPEST is defined in Wikipedia as: TEMPEST is a codename referring to investigations and studies of compromising emanations (CE). Compromising emanations are defined as unintentional intelligence-bearing signals which, if intercepted and analyzed, disclose […]