NSA/CSS @NSAGov
Last week's puzzle wasn’t as puzzling for some of you, so we have a new one geared up for you on this #BrainTeaserTuesday! Start ciphering and deciphering. And, of course, SHARE the puzzle! Puzzle 6 Solution: Frank Rowlett Designed the perfect encryption machine -- the Sigaba https://t.co/jw1MWYllzg — PolitiTweet.org