L’art de deschiffrer. A Seventeenth-Century Treatise on the Art of Deciphering Used by the Spanish Secretariat of State and War in the Southern Netherlands
L’art de deschiffrer. A Seventeenth-Century Treatise on the Art of Deciphering Used by the Spanish Secretariat of State and War in the Southern Netherlands

Summary/Abstract: Between 1668 and 1714, a handbook on cryptography was written in Brussels. It was used by the Spanish authorities (the Secretariat of State and War) in the Southern Netherlands. In 1967, the Belgian historian Jérôme P. Devos published the manuscript. In this article, we present the contents of this publication, highlighting the most important principles of encryption and decryption used in European cryptography.

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