
NSA/CSS @NSAGov
Over 90 yrs ago, a patent for the first five-rotor cipher was given to Edward Hebern. #tbt https://t.co/kNcyOsyka7 https://t.co/kuYxLmgWj2 — PolitiTweet.org
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Thu Sep 29 17:26:03 +0000 2016
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Likely AvailableNSA/CSS @NSAGov
Over 90 yrs ago, a patent for the first five-rotor cipher was given to Edward Hebern. #tbt https://t.co/kNcyOsyka7 https://t.co/kuYxLmgWj2 — PolitiTweet.org