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Blaise de Vigenère (1523–1596) was a French diplomat, cryptographer, and scholar. Born in Saint-Pourçain, France, he was educated in Paris and began his career in diplomacy, serving as a secretary to various French nobles and as an ambassador in Rome[4][5]. Vigenère is best known for the cipher named after him, although it was originally invented by Giovan Battista Bellaso[1]. His notable work, Traicté des chiffres, published in 1586, described this polyalphabetic cipher method[1][2]. Beyond cryptography, Vigenère wrote extensively on alchemy, astrology, and the Kabbalah[2][4].

Sources [1] Blaise de Vigenère Describes What is Later ... - History of Information https://www.historyofinformation.com/detail.php?id=1678 [2] Vigenère, Blaise de° | Encyclopedia.com https://www.encyclopedia.com/religion/encyclopedias-almanacs-transcripts-and-maps/vigenere-blaise-dedeg [3] [PDF] Blaise de Vigenere http://www.cdpa.co.uk/UoP/HoC/Lectures/HoC_08h.PDF [4] Blaise de Vigenère - Wikipedia https://en.wikipedia.org/wiki/Blaise_de_Vigen%C3%A8re [5] 4.2 BLAISE DE VIGENÈRE - Computer Security and ... - O'Reilly https://www.oreilly.com/library/view/computer-security-and/9780471947837/sec4.2.html