{"id":1454,"date":"2025-06-19T11:44:35","date_gmt":"2025-06-19T10:44:35","guid":{"rendered":"https:\/\/workboot.fr\/ciela\/?page_id=1454"},"modified":"2025-12-17T14:37:16","modified_gmt":"2025-12-17T13:37:16","slug":"chiffrements","status":"publish","type":"page","link":"https:\/\/workboot.fr\/ciela\/chiffrements\/","title":{"rendered":"Hash et Chiffrements"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Le&nbsp;<strong><a href=\"https:\/\/workboot.fr\/ciela\/hachage-hash\/\">hachage<\/a><\/strong>&nbsp;est une transformation math\u00e9matique qui prend&nbsp;<strong>n&rsquo;importe quelle donn\u00e9e en entr\u00e9e<\/strong>&nbsp;(texte, fichier, mot de passe, etc.) et produit en sortie une&nbsp;<strong>cha\u00eene de caract\u00e8res de taille fixe<\/strong>&nbsp;(l&#8217;empreinte num\u00e9rique ou hash), de mani\u00e8re&nbsp;<strong>d\u00e9terministe<\/strong>&nbsp;mais&nbsp;<strong>pratiquement irr\u00e9versible<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le&nbsp;<strong>chiffrement<\/strong>&nbsp;est un processus qui transforme des donn\u00e9es&nbsp;<strong>compr\u00e9hensibles<\/strong>&nbsp;(texte clair) en donn\u00e9es&nbsp;<strong>incompr\u00e9hensibles<\/strong>&nbsp;(texte chiffr\u00e9) \u00e0 l&rsquo;aide d&rsquo;un algorithme et d&rsquo;une&nbsp;<strong>cl\u00e9<\/strong>, pour en assurer la&nbsp;<strong>confidentialit\u00e9<\/strong>. Le processus inverse (d\u00e9chiffrement) permet de retrouver les donn\u00e9es originales avec la&nbsp;<strong>bonne cl\u00e9<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/workboot.fr\/ciela\/chiffrement-rsa-en-c\/\">Chiffrement RSA<\/a> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le&nbsp;hachage&nbsp;est une transformation math\u00e9matique qui prend&nbsp;n&rsquo;importe quelle donn\u00e9e en entr\u00e9e&nbsp;(texte, fichier, mot de passe, etc.) et produit en sortie une&nbsp;cha\u00eene de caract\u00e8res de taille fixe&nbsp;(l&#8217;empreinte num\u00e9rique ou hash), de mani\u00e8re&nbsp;d\u00e9terministe&nbsp;mais&nbsp;pratiquement [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-1454","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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