Autokey strikes again!

Did you know that the actual cipher invented by Blaise de Vigenère, back in the XVI century, is not the one that bears his name? The so-called Vigenère cipher was actually invented a few years earlier by Giovan Battista Bellaso. Vigenère’s own creation is a version of what today we call “autokey” cipher, and it is […]

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The Visionnarie cipher

The autokey cipher was invented nearly five hundred years ago by Blaise the Vigenère, pictured at left, but was almost immediately forgotten in favor of a much weaker repeating-key cipher invented by Bellaso, once upon a time known as “the undecipherable cipher,”  which Vigenère somehow got credit for. Given how many important secrets were revealed when […]

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Snake cipher

Not too long ago, I introduced the TripleText cipher, which gets dangerously close to perfect encryption while remaining very simple. Well, it just got even simpler, almost like playing a game. Because using this cipher is so much like playing the old “snake” video game, I’ve called it just that: Snake

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