{"id":6126445,"date":"2024-12-13T10:46:45","date_gmt":"2024-12-13T10:46:45","guid":{"rendered":"https:\/\/www.oodrive.com\/?p=6126445"},"modified":"2025-01-13T11:35:00","modified_gmt":"2025-01-13T11:35:00","slug":"formats-signature-electronique","status":"publish","type":"post","link":"https:\/\/www.oodrive.com\/fr\/blog\/signature-electronique\/types-signature\/formats-signature-electronique\/","title":{"rendered":"PAdES, XAdES, CAdES\u00a0: le point sur les principaux formats de signature \u00e9lectronique"},"content":{"rendered":"\n<p><strong>L\u2019adoption de la signature \u00e9lectronique <\/strong>s\u2019est acc\u00e9l\u00e9r\u00e9e depuis la crise sanitaire. S\u00e9curis\u00e9e, pratique, r\u00e9pondant \u00e0 de nombreux cas d\u2019usage, \u00e0 la fois dans les secteurs public et priv\u00e9, l\u2019e-signature permet d\u2019am\u00e9liorer significativement l\u2019efficacit\u00e9 op\u00e9rationnelle des structures qui l\u2019utilisent.<\/p>\n\n\n\n<p>D\u2019apr\u00e8s le <strong>Barom\u00e8tre de la signature \u00e9lectronique<\/strong>, publi\u00e9 en mars 2024 par Oodrive et OpinionWay, 2,9 d\u00e9partements en moyenne l\u2019utilisaient en 2020. Ils sont en moyenne 4,5 \u00e0 l\u2019utiliser en 2024. Ces chiffres illustrent bien la <strong>capacit\u00e9 de la signature \u00e9lectronique \u00e0 r\u00e9pondre aux diff\u00e9rents besoins professionnels<\/strong>, dans des secteurs vari\u00e9s (ressources humaines, services administratifs, financiers, juridiques, sant\u00e9, etc.) et pour signer diff\u00e9rents types de documents (PDF, XML, etc.).<\/p>\n\n\n\n<p>Afin d\u2019assurer la s\u00e9curit\u00e9, la conformit\u00e9, la validit\u00e9 juridique et technique de l\u2019e-signature, des formats de signature \u00e9lectronique \u2013 notamment les formats PAdES, XAdES et CAdES \u2013 ont \u00e9t\u00e9 standardis\u00e9s au niveau europ\u00e9en par l\u2019ETSI, l&rsquo;organisme officiel de normalisation europ\u00e9en pour les t\u00e9l\u00e9communications. <strong>Chacun de ces formats de signature regroupe un ensemble de r\u00e8gles techniques d\u00e9finissant la mani\u00e8re dont la signature \u00e9lectronique est int\u00e9gr\u00e9e au document \u00e0 signer<\/strong>.<\/p>\n\n\n\n<p>Cet article pr\u00e9sente les <strong>caract\u00e9ristiques essentielles des formats PAdES, XAdES et CAdES<\/strong>, et leurs cas d&rsquo;usage les plus courants pour la signature \u00e9lectronique de documents.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quels sont les diff\u00e9rents formats de signature \u00e9lectronique&nbsp;?<\/h2>\n\n\n\n<p>PAdES, XAdES ou CAdES sont les trois principaux formats de signature \u00e9lectronique. Ils r\u00e9pondent \u00e0 des besoins sp\u00e9cifiques.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le format PAdES (PDF Advanced Electronic Signatures)<\/h3>\n\n\n\n<p><strong>PAdES est le format de signature \u00e9lectronique le plus utilis\u00e9<\/strong>, sp\u00e9cialement con\u00e7u pour la <a href=\"https:\/\/www.oodrive.com\/fr\/guide\/signature-electronique-pdf\/\">signature de fichiers au format PDF<\/a>. Une signature g\u00e9n\u00e9r\u00e9e par PAdES fait partie int\u00e9grante du document (elle est imbriqu\u00e9e dans le fichier sign\u00e9), tout en pr\u00e9servant le contenu original.<\/p>\n\n\n\n<a href=\"https:\/\/www.oodrive.com\/fr\/produits\/oodrive-sign\/\" class=\"product__section\" id=\"sign-banner\"><div class=\"product__section-container\"><p class=\"product__section-title\">Votre signature \u00e9lectronique<\/p><p class=\"product__section-description\">Fluidifiez et facilitez vos \u00e9changes avec une signature \u00e9lectronique conforme et s\u00e9curis\u00e9e.<\/p><img decoding=\"async\" src=\"https:\/\/www.oodrive.com\/wp-content\/plugins\/oodrive-blog-banners\/src\/img\/bg-banner_sign.svg\" class=\"product__section-bg\"\/><\/div><div class=\"product__section-link\"><img decoding=\"async\" src=\"https:\/\/www.oodrive.com\/wp-content\/plugins\/oodrive-blog-banners\/src\/img\/logo-sign-black-color.svg\" class=\"product__section-logo\" alt=\"oodrive sign\"\/><div class=\"cta\"><span>En savoir plus<\/span><\/div><\/div><\/a>\n\n\n\n<p>Les informations relatives au signataire sont ins\u00e9r\u00e9es dans une structure d\u00e9di\u00e9e du document PDF, accompagn\u00e9es d&rsquo;un horodatage qui garantit la validit\u00e9 de la signature. <\/p>\n\n\n\n<p>Tout changement ult\u00e9rieur du document ou de la signature rompt le lien cryptographique entre les deux, permettant ainsi de d\u00e9tecter toute alt\u00e9ration. Il n\u2019est donc pas possible de s\u00e9parer ou de modifier la <a href=\"https:\/\/www.oodrive.com\/fr\/produits\/oodrive-sign\/\">signature \u00e9lectronique<\/a> sans alt\u00e9rer le document.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le format XAdES (XML Advanced Electronic Signatures)<\/h3>\n\n\n\n<p><strong>Le format XAdES est utilis\u00e9 pour la signature \u00e9lectronique avanc\u00e9e de donn\u00e9es et de documents structur\u00e9s au format XML<\/strong> \u2013 Extensible Markup Language (pour des formulaires en ligne, par exemple). Il garantit la non-r\u00e9pudiation du document et facilite le traitement automatis\u00e9 de documents. Il prend en charge la signature multiple de documents.<\/p>\n\n\n\n<p><strong>Une signature au format XAdES <\/strong>produit un fichier .xml, au sein duquel les informations relatives \u00e0 la signature peuvent \u00eatre incorpor\u00e9es (encapsul\u00e9es). Ce format peut \u00e9galement produire un fichier .xml qui ne modifie pas le fichier initial. Les donn\u00e9es sont alors s\u00e9par\u00e9es de la signature, mais peuvent \u00e9galement \u00eatre regroup\u00e9es.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le format CAdES (CMS Advanced Electronic Signatures)<\/h3>\n\n\n\n<p><strong>Ce format fait appel aux standards CMS (Cryptographic Message Syntax) et PKCS #7 pour garantir l\u2019int\u00e9grit\u00e9 et l\u2019authenticit\u00e9 des documents \u00e9lectroniques, <\/strong>ainsi que la non-r\u00e9pudiation du document (le signataire ne peut pas nier avoir sign\u00e9 le document). Le format CADES est donc consid\u00e9r\u00e9 comme particuli\u00e8rement robuste. Il peut \u00eatre utilis\u00e9 pour une tr\u00e8s large vari\u00e9t\u00e9 de types de fichiers num\u00e9riques binaires (les emails, par exemple) et de formats de donn\u00e9es.<\/p>\n\n\n\n<p><strong>Une signature r\u00e9alis\u00e9e au format CAdES<\/strong> peut soit \u00eatre incorpor\u00e9e directement au sein du document sign\u00e9 (encapsul\u00e9e), ou bien \u00eatre stock\u00e9e s\u00e9par\u00e9ment du document (d\u00e9tach\u00e9e), ce qui est d\u2019ailleurs un point commun avec le format XAdES.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quel format de signature \u00e9lectronique choisir en fonction de ses besoins&nbsp;?<\/h2>\n\n\n\n<p>Le choix de l\u2019un ou l\u2019autre format de signature \u00e9lectronique \u2013 PAdES, XAdES ou CAdES \u2013 d\u00e9pend de la nature du document \u00e0 signer, mais aussi du contexte d\u2019utilisation une fois la signature \u00e9lectronique appos\u00e9e sur le document.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PAdES, le format de r\u00e9f\u00e9rence pour la signature \u00e9lectronique de documents PDF<\/h3>\n\n\n\n<p>L\u2019une des caract\u00e9ristiques du format PAdES est de permettre d\u2019ajouter des signatures visibles et lisibles par l\u2019humain sur les documents PDF. Cela en fait un format adapt\u00e9 \u00e0 la signature \u00e9lectronique de documents officiels, contractuels, juridiques, rapports financiers, dossiers m\u00e9dicaux, etc.<\/p>\n\n\n\n<p>Les signatures PAdES sont conformes aux <a href=\"https:\/\/www.oodrive.com\/fr\/blog\/securite\/certification-iso-27001-gage-securite\/\">normes ISO<\/a> pour les PDF. La conformit\u00e9 et la validit\u00e9 des documents sont ainsi assur\u00e9es dans des contextes r\u00e9glement\u00e9s, dans la dur\u00e9e. Les deux points forts du format PAdES sont donc sa capacit\u00e9 \u00e0 int\u00e9grer des signatures visibles et durables.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">XAdES, le format de signature \u00e9lectronique sp\u00e9cialement con\u00e7u pour les documents au format XML<\/h3>\n\n\n\n<p>Le format XAdES est sp\u00e9cialement con\u00e7u pour signer des documents au format XML, largement utilis\u00e9s dans les \u00e9changes de donn\u00e9es. Du fait de la nature structur\u00e9e des documents XML, ce format est particuli\u00e8rement adapt\u00e9 aux traitements automatis\u00e9s.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sa capacit\u00e9 \u00e0 incorporer des donn\u00e9es suppl\u00e9mentaires dans la signature (horodatages, informations sur le <a href=\"https:\/\/www.oodrive.com\/fr\/blog\/reglementation\/certificat-signature-electronique\/\">certificat de signature<\/a>) garantit la validit\u00e9 de la signature sur le long terme. Ces \u00e9l\u00e9ments en font un format particuli\u00e8rement adapt\u00e9 \u00e0 l\u2019administration publique (d\u00e9clarations admnistratives \u00e9lectroniques, facturation \u00e9lectronique, etc.) ou au secteur financier, des secteurs pour lesquels l\u2019int\u00e9grit\u00e9 et la validit\u00e9 des signatures sur le long terme sont capitales.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">CAdES, un format adapt\u00e9 \u00e0 une large vari\u00e9t\u00e9 de fichiers et de donn\u00e9es<\/h3>\n\n\n\n<p>Le format CAdES peut \u00eatre utilis\u00e9 pour une large vari\u00e9t\u00e9 de donn\u00e9es et de fichiers. Il est reconnu pour sa s\u00e9curit\u00e9 et sa <a href=\"https:\/\/www.oodrive.com\/fr\/blog\/reglementation\/signature-electronique-valeur-juridique\/\">valeur juridique<\/a>, ce qui le rend donc particuli\u00e8rement pertinent \u00e0 utiliser pour des documents \u00e0 s\u00e9curiser et \u00e0 archiver sur le long terme.<\/p>\n\n\n\n<div class=\"wp-block-jet-engine-section jet-section wp-block-jet-engine-section jet-section--layout-fullwidth has-red-sign-2-background-color\"><div class=\"jet-section__content\">\n<h2 class=\"wp-block-heading\">PAdES, XAdES, CAdES&nbsp;: que retenir sur ces diff\u00e9rents formats de signature \u00e9lectronique&nbsp;?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PAdES, XAdES et CAdES sont les trois principaux formats de signature \u00e9lectronique standardis\u00e9s au niveau europ\u00e9en&nbsp;: PAdES pour les PDF, qui permet une signature int\u00e9gr\u00e9e au document&nbsp;; XAdES d\u00e9di\u00e9 aux documents XML facilitant l&rsquo;automatisation des traitements, et CAdES pour les fichiers binaires.<\/li>\n\n\n\n<li>Le choix entre ces formats d\u00e9pend essentiellement de deux facteurs : la nature du document \u00e0 signer (PDF, XML ou autre) et le contexte d&rsquo;utilisation (besoin de visibilit\u00e9 de la signature, traitement automatis\u00e9, archivage sur le long terme).<\/li>\n<\/ul>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019adoption de la signature \u00e9lectronique s\u2019est acc\u00e9l\u00e9r\u00e9e depuis la crise sanitaire. S\u00e9curis\u00e9e, pratique, r\u00e9pondant \u00e0 de nombreux cas d\u2019usage, \u00e0 la fois dans les secteurs public et priv\u00e9, l\u2019e-signature permet d\u2019am\u00e9liorer significativement l\u2019efficacit\u00e9 op\u00e9rationnelle des structures qui l\u2019utilisent. D\u2019apr\u00e8s le Barom\u00e8tre de la signature \u00e9lectronique, publi\u00e9 en mars 2024 par Oodrive et OpinionWay, 2,9 d\u00e9partements [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":7887255,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1235],"class_list":["post-6126445","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-types-signature"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PAdES, XAdES, CAdES\u00a0: les formats de signature \u00e9lectronique | Oodrive<\/title>\n<meta name=\"description\" content=\"Le choix d\u2019un format de signature \u00e9lectronique PAdES, XAdES ou CAdES d\u00e9pend du type de document ou de donn\u00e9es \u00e0 signer et de l\u2019utilisation qui en sera faite.\" \/>\n<meta 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