Project Gutenberg 2009-03-01 Public domain in the USA. 54 Simonetta, Cicco 1410 1480 Simonetta, Francesco Perret, P.-M. (Paul-Michel) 1861 1893 Perret, Paul-Michel Les règles de Cicco Simonetta pour le déchiffrement des écritures secrètes Produced by Laurent Vogel, Christine P. Travers and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by the Bibliothèque nationale de France (BnF/Gallica) at http://gallica.bnf.fr) "Les règles de Cicco Simonetta pour le déchiffrement des écritures secrètes" is a historical text attributed to Cicco Simonetta, a secretary and advisor to the dukes of Milan during the Sforza dynasty, written in the late 15th century. This document presents a collection of rules and guidelines on cryptography, focusing on the methods for decoding secret writings that were becoming more prevalent in Italy during this period. The work reflects the early developments in cryptographic practices, coinciding with a time when encoded communication was increasingly important in political and administrative contexts. The text outlines a series of thirteen rules aimed at helping readers decode messages, highlighting techniques based on the frequency of letters and specific word structures in both Latin and vernacular Italian. Simonetta employs an empirical approach, drawing on his personal experiences within the Milanese chancery to offer practical advice for identifying key letters and patterns within encrypted messages. His strategies emphasize the importance of recognizing vowels and common letter combinations, providing insight into the rudimentary techniques of cryptography of the time. Despite its foundational simplicity, Simonetta’s work serves as an important reference in the history of cryptography, illustrating the nascent understanding of secret writing methods in the late 15th century. (This is an automatically generated summary.) fr Cryptography Z Text FR Sciences et Techniques Browsing: Research Methods/Statistics/Information Sys Browsing: Science - General 62593 62602 2024-09-12T07:45:26.832211 2023-09-12T11:04:19.604238 text/html text/html 57997 2009-03-01T11:08:36 text/html; charset=iso-8859-1 20427 2009-03-01T11:08:36 text/html; charset=iso-8859-1 application/zip 89705 2024-09-12T07:45:30.449212 application/epub+zip 88458 2024-09-12T07:45:28.218228 application/epub+zip 88459 2024-09-12T07:45:27.357203 application/epub+zip 275152 2024-09-12T07:45:32.043198 application/x-mobipocket-ebook 262268 2024-09-12T07:45:29.876190 application/x-mobipocket-ebook 262505 2022-09-13T07:42:08.920622 application/x-mobipocket-ebook 47865 47588 2024-09-12T07:45:26.535232 2023-09-12T11:04:19.319300 text/plain; charset=us-ascii text/plain 47155 2009-03-01T11:08:34 text/plain; charset=iso-8859-1 18374 2009-03-01T11:08:36 text/plain; charset=iso-8859-1 application/zip 19267 2024-09-12T07:45:32.177178 application/rdf+xml 24519 2024-09-12T07:45:27.709207 image/jpeg 4514 2024-09-12T07:45:27.528224 image/jpeg 89921 2024-09-12T07:45:26.838216 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia fr.wikipedia