
NSA/CSS @NSAGov
On July 22, 1919, inventor Gilbert Vernam received a patent for his "Secret Signaling System." The @USArmy 1925 SIG… https://t.co/rdVoOufufr — PolitiTweet.org
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Thu Jul 26 16:10:00 +0000 2018
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Likely AvailableNSA/CSS @NSAGov
On July 22, 1919, inventor Gilbert Vernam received a patent for his "Secret Signaling System." The @USArmy 1925 SIG… https://t.co/rdVoOufufr — PolitiTweet.org