Project Gutenberg 2013-03-10 Public domain in the USA. 153 Jacob, P. L. 1806 1884 Lacroix, Paul Jacob, Paul L. Dufour, Pierre Jacob, Bibliophile Jacob, Paul Lacroix 96140672 La Cryptographie, ou, l'art d'écrire en chiffres Produced by Laurent Vogel, Christine P. Travers and the Online Distributed Proofreading Team at http://www.pgdp.net (This book was produced from scanned images of public domain material from the Google Print project.) "La Cryptographie, ou, l'art d'écrire en chiffres" by P. L. Jacob is a scientific publication written in the mid-19th century. This work delves into the intricate world of cryptography, exploring both its historical origins and various methods developed over time for encoding secret messages. The book covers a wide range of cryptographic techniques used from antiquity to the modern era. At the start of the text, the author introduces the concept of cryptography and its various applications as a means of concealing written communications from prying eyes. The opening chapter outlines historical methods utilized for secret writing, referencing ancient examples such as the clever techniques attributed to figures like Herodotus and the Lacédémonians using devices like the scytale. It sets the stage for a comprehensive exploration of cryptographic methods across different societies and epochs, establishing a foundation for further discussion on the complex art of secret writing that formed a significant part of communication in both personal and political contexts. (This is an automatically generated summary.) file:///public/vhost/g/gutenberg/html/files/42297/42297-h/images/cover-page.jpg Reading ease score: 63.5 (8th & 9th grade). Neither easy nor difficult to read. fr Cryptography Ciphers Signs and symbols Z Text FR Sciences et Techniques Category: History - Other Category: Research Methods/Statistics/Information Sys 332251 2025-07-17T06:57:14.587096 text/html 309282 2024-10-23T14:39:40 text/html 337360 2025-07-17T06:57:21.896078 application/epub+zip 336245 2025-07-17T06:57:15.879062 application/epub+zip 160248 2025-07-17T06:57:15.230083 application/epub+zip 457779 2025-07-17T06:57:25.742066 application/x-mobipocket-ebook 421755 2025-07-17T06:57:21.178039 application/x-mobipocket-ebook 248898 2022-09-19T10:27:40.026476 application/x-mobipocket-ebook 245981 2023-09-18T10:57:43.956665 text/plain 226041 2024-10-23T14:39:40 text/plain; charset=us-ascii 17349 2025-07-17T06:57:25.894996 application/rdf+xml 12695 2025-07-17T06:57:15.338081 image/jpeg 2414 2025-07-17T06:57:15.287038 image/jpeg 350001 2025-07-17T06:57:14.658042 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog fr.wikipedia en.wikipedia