{"id":124,"date":"2026-07-16T09:00:00","date_gmt":"2026-07-16T09:00:00","guid":{"rendered":"https:\/\/team-web-hosting.example\/?p=124"},"modified":"2026-07-16T09:00:00","modified_gmt":"2026-07-16T09:00:00","slug":"chiffrement-donnees-repos-transit","status":"publish","type":"post","link":"https:\/\/webhostingproduct.ovh\/?p=124","title":{"rendered":"Chiffrement des donn\u00e9es : au repos et en transit"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"\/MEDIA_BASE_URL\/chiffrement-donnees-repos-transit.png\" alt=\"Illustration \u2014 Chiffrement des donn\u00e9es : au repos et en transit\"\/><\/figure>\n\n<p>Le chiffrement est la derni\u00e8re ligne de d\u00e9fense de vos donn\u00e9es : m\u00eame en cas d&rsquo;interception ou de vol, des donn\u00e9es chiffr\u00e9es restent illisibles sans la cl\u00e9. Deux moments cl\u00e9s doivent \u00eatre couverts : le transit et le repos.<\/p>\n\n<h2>Le chiffrement en transit<\/h2>\n<p>Les donn\u00e9es en transit sont celles qui circulent sur le r\u00e9seau \u2014 entre un navigateur et un serveur, entre deux services, ou vers une sauvegarde distante. Sans chiffrement, elles peuvent \u00eatre intercept\u00e9es et lues en clair. Le protocole HTTPS, fond\u00e9 sur TLS, chiffre ces \u00e9changes et constitue aujourd&rsquo;hui un standard incontournable pour tout site.<\/p>\n\n<h2>Le chiffrement au repos<\/h2>\n<p>Les donn\u00e9es au repos sont celles stock\u00e9es sur disque : bases de donn\u00e9es, fichiers, sauvegardes. Le chiffrement au repos garantit qu&rsquo;un acc\u00e8s physique au support \u2014 disque vol\u00e9, mat\u00e9riel mal effac\u00e9 \u2014 ne donne pas acc\u00e8s au contenu. C&rsquo;est une protection contre les menaces qui contournent le r\u00e9seau.<\/p>\n\n<h2>La gestion des cl\u00e9s, point critique<\/h2>\n<p>Le chiffrement ne vaut que par la protection des cl\u00e9s qui le d\u00e9verrouillent. Une cl\u00e9 mal prot\u00e9g\u00e9e annule tout le b\u00e9n\u00e9fice. Les bonnes pratiques incluent :<\/p>\n<ul>\n<li>s\u00e9parer les cl\u00e9s des donn\u00e9es qu&rsquo;elles prot\u00e8gent ;<\/li>\n<li>restreindre strictement l&rsquo;acc\u00e8s aux cl\u00e9s ;<\/li>\n<li>renouveler les cl\u00e9s p\u00e9riodiquement ;<\/li>\n<li>envisager, pour les cas sensibles, de conserver la ma\u00eetrise de ses propres cl\u00e9s.<\/li>\n<\/ul>\n\n<h2>Chiffrement et confidentialit\u00e9<\/h2>\n<p>Une question centrale se pose : qui d\u00e9tient les cl\u00e9s ? Si l&rsquo;h\u00e9bergeur les d\u00e9tient, il a techniquement la capacit\u00e9 de d\u00e9chiffrer les donn\u00e9es. Les mod\u00e8les o\u00f9 le client garde la ma\u00eetrise de ses cl\u00e9s offrent une confidentialit\u00e9 renforc\u00e9e, au prix d&rsquo;une responsabilit\u00e9 accrue sur la gestion de ces cl\u00e9s.<\/p>\n\n<h2>Une couche parmi d&rsquo;autres<\/h2>\n<p>Le chiffrement ne remplace ni le contr\u00f4le d&rsquo;acc\u00e8s, ni les sauvegardes, ni la surveillance : il les compl\u00e8te. Une infrastructure s\u00e9rieuse chiffre par d\u00e9faut les \u00e9changes et propose le chiffrement du stockage. OVHcloud int\u00e8gre le chiffrement en transit et propose des options de chiffrement au repos, sur une infrastructure europ\u00e9enne \u2014 la combinaison chiffrement plus souverainet\u00e9 renfor\u00e7ant la protection globale des donn\u00e9es.<\/p>","protected":false},"excerpt":{"rendered":"<p>Chiffrer les donn\u00e9es en transit et au repos prot\u00e8ge leur confidentialit\u00e9. Comprendre ces deux niveaux et la gestion des cl\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":1124,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[],"class_list":["post-124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-souverainete-securite"],"_links":{"self":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts\/124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=124"}],"version-history":[{"count":0,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=\/wp\/v2\/posts\/124\/revisions"}],"wp:attachment":[{"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webhostingproduct.ovh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}