{"id":5307,"date":"2025-12-19T20:10:31","date_gmt":"2025-12-19T20:10:31","guid":{"rendered":"https:\/\/mgcomdev.wpenginepowered.com\/glossary\/cryptographie-asymetrique\/"},"modified":"2026-09-09T04:07:32","modified_gmt":"2026-09-09T04:07:32","slug":"cryptographie-a-cle-publique","status":"publish","type":"glossary","link":"https:\/\/www.mailgun.com\/fr\/glossaire\/cryptographie-a-cle-publique\/","title":{"rendered":"Cryptographie \u00e0 cl\u00e9 publique"},"content":{"rendered":"<h1>Cryptographie \u00e0 cl\u00e9 publique<\/h1>\n<p><span data-contrast=\"none\">La cryptographie \u00e0 cl\u00e9 publique, \u00e9galement appel\u00e9e chiffrement asym\u00e9trique, utilise une paire de cl\u00e9s<\/span><span data-contrast=\"none\">\u00a0\u2013\u00a0<\/span><span data-contrast=\"none\">une publique, une priv\u00e9e<\/span><span data-contrast=\"none\">\u00a0\u2013\u00a0<\/span><span data-contrast=\"none\">pour \u00e9changer des donn\u00e9es en toute s\u00e9curit\u00e9. La cl\u00e9 publique est partag\u00e9e ouvertement, tandis que la cl\u00e9 priv\u00e9e est gard\u00e9e secr\u00e8te. Tout ce qui est chiffr\u00e9 avec une cl\u00e9 ne peut \u00eatre d\u00e9chiffr\u00e9 qu&rsquo;avec l&rsquo;autre.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Dans l&#8217;email, ce mod\u00e8le cryptographique intervient principalement \u00e0 deux niveaux\u00a0: <\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"65\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"none\">Les protocoles de chiffrement comme TLS utilisent la cryptographie \u00e0 cl\u00e9 publique pour prot\u00e9ger les messages en transit.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"65\" data-list-defn-props=\"{\" data-aria-posinset=\"2\" data-aria-level=\"1\"><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/authentification-des-emails-votre-carte-identite-pour-envoi\/\"><span data-contrast=\"none\">Normes d&rsquo;authentification<\/span><\/a><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">comme<\/span><span data-contrast=\"none\">\u00a0<\/span><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/comprendre-dkim-fonctionnement\/\"><span data-contrast=\"none\">DKIM<\/span><\/a><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">l&rsquo;utilisent<\/span><span data-contrast=\"none\">\u00a0pour signer les messages sortants avec une cl\u00e9 priv\u00e9e que les fournisseurs de messagerie peuvent v\u00e9rifier \u00e0 l&rsquo;aide de la cl\u00e9 publique publi\u00e9e dans le DNS.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"none\">Ce mod\u00e8le garantit que les messages n&rsquo;ont pas \u00e9t\u00e9 modifi\u00e9s et proviennent bien de l&rsquo;exp\u00e9diteur d\u00e9clar\u00e9<\/span><span data-contrast=\"none\">,\u00a0<\/span><span data-contrast=\"none\">instaurant ainsi un climat de confiance avec les FAI et les destinataires.\u00a0<\/span><span data-contrast=\"none\">En bref<\/span><span data-contrast=\"none\">,<\/span><span data-contrast=\"none\">\u00a0<\/span><span data-contrast=\"none\">l<\/span><span data-contrast=\"none\">a cryptographie \u00e0 cl\u00e9 publique permet \u00e0 votre email de prouver qu&rsquo;il s&rsquo;agit bien de vous<\/span><span data-contrast=\"none\">\u00a0et\u00a0<\/span><span data-contrast=\"none\">non d&rsquo;une usurpation.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cryptographie \u00e0 cl\u00e9 publique La cryptographie \u00e0 cl\u00e9 publique, \u00e9galement appel\u00e9e chiffrement asym\u00e9trique, utilise une paire de cl\u00e9s\u00a0\u2013\u00a0une publique, une priv\u00e9e\u00a0\u2013\u00a0pour \u00e9changer des donn\u00e9es en toute s\u00e9curit\u00e9. La cl\u00e9 publique est partag\u00e9e ouvertement, tandis que la cl\u00e9 priv\u00e9e est gard\u00e9e secr\u00e8te. Tout ce qui est chiffr\u00e9 avec une cl\u00e9 ne peut \u00eatre d\u00e9chiffr\u00e9 qu&rsquo;avec l&rsquo;autre.\u00a0\u00a0 [&hellip;]<\/p>\n","protected":false},"author":1,"template":"","meta":{"_acf_changed":false},"class_list":["post-5307","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cryptographie \u00e0 cl\u00e9 publique \u2013 Glossaire des termes d&#039;email | Mailgun<\/title>\n<meta name=\"description\" content=\"La cryptographie \u00e0 cl\u00e9 publique est le processus d&#039;utilisation d&#039;une cl\u00e9 publique et d&#039;une cl\u00e9 priv\u00e9e pour chiffrer des donn\u00e9es. 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