Conference article

Trithemius, Bellaso, Vigenère – Origins of the Polyalphabetic Ciphers

Paolo Bonavoglia
Mathesis Venezia c/o Convitto-Liceo Marco Foscarini 4942 Venezia, Italy

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Published in: Proceedings of the 3rd International Conference on Historical Cryptology HistoCrypt 2020

Linköping Electronic Conference Proceedings 171:7, p. 46-51

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Published: 2020-05-19

ISBN: 978-91-7929-827-2

ISSN: 1650-3686 (print), 1650-3740 (online)


The purpose of this paper is to show how polyalphabetic ciphers developed, using primary sources, from Trithemius and Bellaso to Vigenère, including the recent discovery of the Bellaso 1552 zero cipher.


Trithemius; Bellaso; Vigenère; Polyalphabetic cipher


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