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A: Napoli, Campania, Italy

Giambattista della Porta Publishes the First Known Digraphic Substitution Cypher


Italian scientist, polymath, playwright, and "professor of secrets" Giambattista della Porta published in Naples at the press of Giovanni Maria Scoto De Furtivis Literarum Notis. In this work on cryptography Porta described the first known digraphic substitution cipher (cypher).

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