Giovan Battista Bellaso was an Italian cryptologist, born in Brescia.
La cifra ("The Cipher"), 1553
Family tree of Giovan Battista Bellaso
La cifra del Sig. Giovan Battista Bel[l]aso ... Venetia 1553. Reciprocal table.
La cifra del Sig. Giovan Battista Belaso ... Venetia 1553. Foreword.
The Vigenère cipher is a method of encrypting alphabetic text where each letter of the plaintext is encoded with a different Caesar cipher, whose increment is determined by the corresponding letter of
Giovan Battista Bellaso
…rtiraacinquedilugl io Plaintext This cipher is a letter-by-letter polysubstitution using a long literal key string. It is very similar to the Vigenère cipher, making many scholars call Bellaso its inventor, although unlike the modern Vigenère cipher Bellaso didn't use 26 different "shifts" (different Caesar's…
The Vigenère cipher is named after Blaise de Vigenère (pictured), although Giovan Battista Bellaso had invented it before Vigenère described his autokey cipher.
Cryptographic slide rule used as a calculation aid by the Swiss Army between 1914 and 1940
Confederate cipher wheel, captured at the surrender of Mobile, Alabama, in May 1865 – National Cryptologic Museum