{"id":878,"date":"2023-09-21T21:49:19","date_gmt":"2023-09-21T19:49:19","guid":{"rendered":"https:\/\/mickinformatique.fr\/?p=878"},"modified":"2023-09-21T21:49:19","modified_gmt":"2023-09-21T19:49:19","slug":"uefi-et-gpt-et-nouveau-mecanisme-de-demarrage","status":"publish","type":"post","link":"https:\/\/mickinformatique.fr\/index.php\/2023\/09\/21\/uefi-et-gpt-et-nouveau-mecanisme-de-demarrage\/","title":{"rendered":"UEFI et GPT et nouveau m\u00e9canisme de d\u00e9marrage"},"content":{"rendered":"<p>Auparavant les BIOS cherchait le secteur d\u2019amor\u00e7age dit\u00a0<strong><a href=\"https:\/\/www.malekal.com\/quest-ce-que-le-mbr-master-boot-record\/\">MBR (Master Boot Record)<\/a><\/strong>.<br \/>\nDe plus, le MBR stocke la table de partition qui stocke les informations des partitions de disque.<br \/>\nEnfin ce dernier n\u2019avait aucun m\u00e9canisme de s\u00e9curit\u00e9.<\/p>\n<p>L\u2019UEFI ne fonctionne pas avec la structure de disque MBR mais avec la structure de disque\u00a0<a href=\"https:\/\/www.malekal.com\/differences-mbr-gpt-partitions-de-disque\/\">GPT\u00a0<strong>(<em>GUID Partition Table<\/em>)<\/strong><\/a>.<br \/>\nLa principale diff\u00e9rence est que le disque GPT contient\u00a0<a href=\"https:\/\/www.malekal.com\/la-partition-efi-ou-esp\/\">une partition EFI<\/a>\u00a0qui remplace la zone d\u2019amor\u00e7age.<br \/>\nC\u2019est une partition du syst\u00e8me sp\u00e9ciale qui stocke le firmware EFI.<br \/>\nLors du d\u00e9marrage du PC UEFI, ce dernier charge le firmware EFI pr\u00e9sente dans cette partition EFI.<\/p>\n<p>Ce firmware EFI est sign\u00e9 num\u00e9rique, toute falsification est donc impossible.<br \/>\n<strong><a href=\"https:\/\/www.malekal.com\/quest-ce-que-secure-boot-protection-pc-uefi-comment-ca-marche\/\">Le Secure boot (d\u00e9marrage s\u00e9curis\u00e9)<\/a><\/strong>\u00a0se charge de v\u00e9rifier la signature et bloque tout chargement de firmware malveillant.<br \/>\nPour cela, le Secure boot utilise le\u00a0<a href=\"https:\/\/www.malekal.com\/tpm-1-2-vs-tpm-2-0-les-differences\/\"><strong>TPM (Trusted Platform Module)<\/strong><\/a>.<br \/>\nC\u2019est une plateforme de module s\u00e9curis\u00e9e qui met \u00e0 disposition un syst\u00e8me cryptographique pour le PC et les logiciels.<\/p>\n<p>Ainsi l\u2019UEFI revoit les phases de d\u00e9marrage du PC afin de\u00a0<strong>garantir l\u2019int\u00e9grit\u00e9 de la plateforme<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Auparavant les BIOS cherchait le secteur d\u2019amor\u00e7age dit\u00a0MBR (Master Boot Record). De plus, le MBR stocke la table de partition qui stocke [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-878","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/posts\/878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/comments?post=878"}],"version-history":[{"count":1,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/posts\/878\/revisions"}],"predecessor-version":[{"id":879,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/posts\/878\/revisions\/879"}],"wp:attachment":[{"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/media?parent=878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/categories?post=878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mickinformatique.fr\/index.php\/wp-json\/wp\/v2\/tags?post=878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}