{"id":4545,"date":"2025-10-22T00:00:02","date_gmt":"2025-10-21T22:00:02","guid":{"rendered":"https:\/\/tswanhosting.com\/learn\/?p=4545"},"modified":"2025-10-22T00:00:05","modified_gmt":"2025-10-21T22:00:05","slug":"les-sels-wordpress-quest-ce-que-cest-et-pourquoi-cest-vital","status":"publish","type":"post","link":"https:\/\/tswanhosting.com\/learn\/wordpress\/les-sels-wordpress-quest-ce-que-cest-et-pourquoi-cest-vital\/","title":{"rendered":"Les Sels WordPress : Qu&rsquo;est-ce que c&rsquo;est et pourquoi c&rsquo;est vital ?"},"content":{"rendered":"<p>Au c\u0153ur de chaque installation WordPress se trouve un fichier de configuration, <code>wp-config.php<\/code>, qui contient les cl\u00e9s du royaume : les identifiants de votre base de donn\u00e9es. Mais juste en dessous de ces informations critiques se cache un bloc de code qui semble cryptique et qui est souvent ignor\u00e9 : les <strong>cl\u00e9s de s\u00e9curit\u00e9 et les sels (Salts)<\/strong>. Ces huit lignes de texte al\u00e9atoire ne sont pas l\u00e0 pour faire joli. En effet, elles constituent l&rsquo;une des couches de s\u00e9curit\u00e9 les plus fondamentales de votre site, agissant comme un ingr\u00e9dient secret qui prot\u00e8ge l&rsquo;une de vos donn\u00e9es les plus pr\u00e9cieuses : vos sessions de connexion. Comprendre ce qu&rsquo;elles sont, comment elles fonctionnent et pourquoi vous devriez les changer est une \u00e9tape essentielle pour passer d&rsquo;un simple utilisateur \u00e0 un administrateur WordPress averti et s\u00e9curis\u00e9.<\/p>\n<h2>Que sont les &quot;Sels&quot; WordPress ? L&rsquo;ingr\u00e9dient secret de votre s\u00e9curit\u00e9<\/h2>\n<p>Imaginez que votre mot de passe est une recette de base. Si quelqu&rsquo;un la conna\u00eet, il peut reproduire votre plat. Maintenant, imaginez que vous ajoutiez \u00e0 cette recette un ingr\u00e9dient secret, unique et complexe, que vous seul connaissez. M\u00eame si quelqu&rsquo;un vole la recette de base, il lui sera impossible de recr\u00e9er le plat sans cet ingr\u00e9dient secret.<\/p>\n<p>Les sels WordPress sont cet ingr\u00e9dient secret. Ce sont des cha\u00eenes de caract\u00e8res longues et al\u00e9atoires qui sont ajout\u00e9es \u00e0 vos mots de passe avant qu&rsquo;ils ne soient stock\u00e9s et v\u00e9rifi\u00e9s. Ce processus, appel\u00e9 &quot;salage&quot; et &quot;hachage&quot;, transforme un mot de passe simple comme &quot;monmotdepasse&quot; en une cha\u00eene de caract\u00e8res complexe et illisible comme <code>a8f5f167f44f4964e6c998dee827110c<\/code>.<\/p>\n<p>Ces sels se trouvent dans votre fichier <code>wp-config.php<\/code> et ressemblent \u00e0 ceci :<\/p>\n<pre><code class=\"language-php\">define( 'AUTH_KEY',         'mettez votre phrase unique ici' );\ndefine( 'SECURE_AUTH_KEY',  'mettez votre phrase unique ici' );\ndefine( 'LOGGED_IN_KEY',    'mettez votre phrase unique ici' );\ndefine( 'NONCE_KEY',        'mettez votre phrase unique ici' );\ndefine( 'AUTH_SALT',        'mettez votre phrase unique ici' );\ndefine( 'SECURE_AUTH_SALT', 'mettez votre phrase unique ici' );\ndefine( 'LOGGED_IN_SALT',   'mettez votre phrase unique ici' );\ndefine( 'NONCE_SALT',       'mettez votre phrase unique ici' );<\/code><\/pre>\n<h2>\u00c0 quoi servent-ils concr\u00e8tement ? La protection des cookies<\/h2>\n<p>La principale fonction des sels est de s\u00e9curiser les <strong>cookies<\/strong> de connexion. Lorsque vous vous connectez \u00e0 WordPress et cochez la case &quot;Se souvenir de moi&quot;, WordPress stocke un cookie dans votre navigateur pour vous maintenir connect\u00e9. Sans les sels, les informations de ce cookie seraient beaucoup plus faciles \u00e0 d\u00e9chiffrer pour un pirate qui parviendrait \u00e0 le voler (une attaque de type &quot;session hijacking&quot;).<\/p>\n<p>Gr\u00e2ce aux sels, les informations stock\u00e9es dans le cookie sont fortement crypt\u00e9es. M\u00eame si un pirate met la main dessus, il lui sera extr\u00eamement difficile de l&rsquo;utiliser pour se connecter \u00e0 votre compte.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/tswanhosting.com\/learn\/wp-content\/uploads\/2025\/10\/illustration-fonctionnement-sels-wordpress-20251021001040.png\" alt=\"Infographie montrant un mot de passe et un &quot;sel&quot; entrant dans un mixeur &quot;WordPress&quot; pour en sortir un cookie crypt\u00e9 et s\u00e9curis\u00e9.\" \/><\/p>\n<h2>Le &quot;Bouton Panique&quot; : Pourquoi vous devez savoir les changer<\/h2>\n<p>L&rsquo;une des fonctionnalit\u00e9s de s\u00e9curit\u00e9 les plus puissantes des sels est souvent m\u00e9connue. <strong>Changer les sels WordPress d\u00e9connecte instantan\u00e9ment tous les utilisateurs connect\u00e9s au site.<\/strong><\/p>\n<p>Cela transforme les sels en un &quot;bouton panique&quot; extr\u00eamement efficace. Si vous pensez que votre site a \u00e9t\u00e9 compromis, ou si vous voyez une session utilisateur suspecte, la premi\u00e8re chose \u00e0 faire est de changer vos sels. Cela invalidera tous les cookies de connexion existants, expulsant tout le monde \u2014 y compris les \u00e9ventuels pirates \u2014 et for\u00e7ant chaque utilisateur \u00e0 se reconnecter avec son mot de passe.<\/p>\n<h2>Comment g\u00e9n\u00e9rer et mettre \u00e0 jour vos sels WordPress<\/h2>\n<p>Il est recommand\u00e9 de changer vos sels p\u00e9riodiquement, et obligatoirement apr\u00e8s tout soup\u00e7on de faille de s\u00e9curit\u00e9. Le processus est simple et ne prend que deux minutes.<\/p>\n<ol>\n<li><strong>G\u00e9n\u00e9rez de nouveaux sels :<\/strong> Rendez-vous sur le g\u00e9n\u00e9rateur de cl\u00e9s de s\u00e9curit\u00e9 officiel de WordPress : <strong><a href=\"https:\/\/api.wordpress.org\/secret-key\/1.1\/salt\/\">https:\/\/api.wordpress.org\/secret-key\/1.1\/salt\/<\/a><\/strong>. Cette page vous fournira un nouveau bloc de huit cl\u00e9s enti\u00e8rement al\u00e9atoires.<\/li>\n<li><strong>Copiez le nouveau bloc :<\/strong> S\u00e9lectionnez et copiez l&rsquo;int\u00e9gralit\u00e9 du code g\u00e9n\u00e9r\u00e9.<\/li>\n<li><strong>Acc\u00e9dez \u00e0 votre <code>wp-config.php<\/code> :<\/strong> Connectez-vous \u00e0 votre site via FTP ou le Gestionnaire de fichiers de votre panneau d&rsquo;h\u00e9bergement (fourni par votre h\u00e9bergeur comme <strong>Tswan Hosting<\/strong>).<\/li>\n<li><strong>Ouvrez et modifiez le fichier :<\/strong> Trouvez et ouvrez le fichier <code>wp-config.php<\/code> qui se trouve \u00e0 la racine de votre installation WordPress.<\/li>\n<li><strong>Remplacez les anciens sels :<\/strong> Rep\u00e9rez le bloc de d\u00e9finitions <code>AUTH_KEY<\/code>, <code>SECURE_AUTH_KEY<\/code>, etc., et remplacez-le enti\u00e8rement par le nouveau bloc que vous venez de copier.<\/li>\n<li><strong>Enregistrez le fichier.<\/strong><\/li>\n<\/ol>\n<p>C&rsquo;est tout ! Tous les utilisateurs seront d\u00e9connect\u00e9s, et votre site sera d\u00e9sormais s\u00e9curis\u00e9 par un nouvel ensemble de cl\u00e9s.<\/p>\n<p>En conclusion, les sels WordPress sont un m\u00e9canisme de s\u00e9curit\u00e9 simple mais vital. Ils renforcent consid\u00e9rablement la protection de vos comptes utilisateurs contre les attaques courantes. Apprendre \u00e0 les g\u00e9rer est une preuve de bonne hygi\u00e8ne de s\u00e9curit\u00e9, une pratique que les h\u00e9bergeurs s\u00e9rieux comme <strong>Tswan Hosting<\/strong> et les agences de d\u00e9veloppement professionnelles comme <strong>Tswan Softwares<\/strong> consid\u00e8rent comme non n\u00e9gociable.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/tswanhosting.com\/learn\/wp-content\/uploads\/2025\/10\/cta-hebergement-wordpress-securise.png\" alt=\"Banni\u00e8re publicitaire pour l&#039;h\u00e9bergement WordPress s\u00e9curis\u00e9 de Tswan\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au c\u0153ur de chaque installation WordPress se trouve un fichier de configuration, wp-config.php, qui contient les cl\u00e9s du royaume : les identifiants de votre base de donn\u00e9es. Mais juste en dessous de ces informations critiques se cache un bloc de code qui semble cryptique et qui est souvent ignor\u00e9 : les cl\u00e9s de s\u00e9curit\u00e9 et [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,186,55],"tags":[304,303,83,300,66,301,302],"class_list":{"0":"post-4545","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-securite","7":"category-tutoriel","8":"category-wordpress","9":"tag-cookies","10":"tag-hachage","11":"tag-securite-wordpress","12":"tag-sels-wordpress","13":"tag-tswan-hosting","14":"tag-wordpress-salts","15":"tag-wp-config-php"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les Sels WordPress : Qu&#039;est-ce que c&#039;est et pourquoi c&#039;est vital ? - Tswan Learn<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tswanhosting.com\/learn\/wordpress\/les-sels-wordpress-quest-ce-que-cest-et-pourquoi-cest-vital\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les Sels WordPress : Qu&#039;est-ce que c&#039;est et pourquoi c&#039;est vital ? - Tswan Learn\" \/>\n<meta property=\"og:description\" content=\"Au c\u0153ur de chaque installation WordPress se trouve un fichier de configuration, wp-config.php, qui contient les cl\u00e9s du royaume : les identifiants de votre base de donn\u00e9es. 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