History This cipher was invented in 1586 by Blaise de Vigenère with a reciprocal table of ten alphabets. Vigenère's version used an agreed-upon letter of the alphabet as a primer, making the key by writing down that letter and then the rest of the message.
History This cipher was invented in 1586 by Blaise de Vigenère with a reciprocal table of ten alphabets Vigenère's version used an agreed-upon letter of the alphabet as a primer making the key by writing down that letter and then the rest of the message