{"id":3695767,"date":"2024-04-04T13:17:30","date_gmt":"2024-04-04T13:17:30","guid":{"rendered":"https:\/\/pp2.oodrive.com\/?p=3695767"},"modified":"2024-07-23T15:13:10","modified_gmt":"2024-07-23T15:13:10","slug":"cloud-public","status":"publish","type":"post","link":"https:\/\/pp2.oodrive.com\/fr\/blog\/securite\/cloud-public\/","title":{"rendered":"Qu&rsquo;est-ce qu&rsquo;un cloud public ?"},"content":{"rendered":"\n<p>Qu\u2019elles soient publiques ou priv\u00e9es, les organisations s\u2019appuient d\u00e9sormais massivement sur le cloud computing pour stocker et partager leurs ressources num\u00e9riques. <\/p>\n\n\n\n<p>Derri\u00e8re cette appellation \u00ab&nbsp;cloud&nbsp;\u00bb se cachent en r\u00e9alit\u00e9 diff\u00e9rents types d\u2019environnements&nbsp;: cloud public, cloud priv\u00e9, cloud hybride. <\/p>\n\n\n\n<p>Le choix de l\u2019un ou l\u2019autre type de cloud par les d\u00e9partements IT d\u00e9pend des besoins et des exigences propres \u00e0 chaque organisation (notamment en mati\u00e8re de co\u00fbt, de flexibilit\u00e9 et de s\u00e9curit\u00e9).<\/p>\n\n\n\n<p>Passons en revue le fonctionnement d\u2019un cloud public, ses principaux avantages et inconv\u00e9nients, ainsi que ses sp\u00e9cificit\u00e9s par rapport aux autres types de cloud que sont le cloud priv\u00e9 et le cloud hybride.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment fonctionne le cloud public&nbsp;?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Cloud public&nbsp;: d\u00e9finition<\/h3>\n\n\n\n<p>Le cloud public est une infrastructure informatique d\u00e9tenue, g\u00e9r\u00e9e et maintenue par un fournisseur de services cloud (cloud provider) et accessible via Internet. <\/p>\n\n\n\n<p>Le fournisseur met cette infrastructure \u00e0 disposition de l\u2019utilisateur final (le client) en \u00e9change d\u2019un abonnement. On parle \u00e9galement d\u2019informatique \u00e0 la demande et d\u2019approvisionnement en libre-service.<\/p>\n\n\n\n<p>Au sein d\u2019un cloud public, l\u2019environnement est partitionn\u00e9 et redistribu\u00e9 \u00e0 plusieurs clients qui sont en quelque sorte \u00ab&nbsp;locataires&nbsp;\u00bb de leur espace de travail. <\/p>\n\n\n\n<p>Le cloud public s\u2019appuie sur une mise en commun des ressources, mais les donn\u00e9es des diff\u00e9rents utilisateurs restent malgr\u00e9 tout s\u00e9par\u00e9es.<\/p>\n\n\n\n<section class=\"product__section\" id=\"snc-banner\"><div class=\"product__section-container\"><p class=\"product__section-title\">SecNumCloud : label de confiance<\/p><p class=\"product__section-description\">Le r\u00e9f\u00e9rentiel qui garantit le plus haut niveau de s\u00e9curit\u00e9 pour la protection de vos donn\u00e9es sensibles.<\/p><img decoding=\"async\" src=\"..\/..\/..\/..\/wp-content\/plugins\/oodrive-blog-banners\/src\/img\/bg-banner_work.svg\" class=\"product__section-bg\"\/><\/div><div class=\"product__section-link\"><img decoding=\"async\" src=\"..\/..\/..\/..\/wp-content\/plugins\/oodrive-blog-banners\/src\/img\/logo-snc.svg\" class=\"product__section-logo\" alt=\"SecNumCloud - Oodrive\"\/><div class=\"cta\"><a href=\"https:\/\/pp2.oodrive.com\/fr\/secnumcloud\/\">D\u00e9couvrir<\/a><\/div><\/div><\/section>\n\n\n\n<p>Le cloud public est particuli\u00e8rement adapt\u00e9 aux organisations en forte croissance, puisqu\u2019il s\u2019agit d\u2019une solution plut\u00f4t rapide \u00e0 mettre en \u0153uvre et accessible d\u2019un point de vue financier. Les utilisateurs n\u2019ont pas besoin de s\u2019engager sur le long terme en achetant du mat\u00e9riel informatique.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les principaux avantages du \u00ab&nbsp;public cloud&nbsp;\u00bb<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u00c9volutivit\u00e9 et mise \u00e0 l\u2019\u00e9chelle<\/h4>\n\n\n\n<p>\u00c9volutif, le cloud public est capable de s\u2019adapter \u00e0 des demandes fluctuantes et \u00e0 des charges de travail plus importantes que celles pr\u00e9vues initialement. <\/p>\n\n\n\n<p>Concr\u00e8tement, les organisations ayant fait le choix d\u2019un cloud public peuvent facilement augmenter ou r\u00e9duire leur utilisation du service cloud selon l\u2019\u00e9volution de leurs besoins.<\/p>\n\n\n\n<p>En cas de pics d\u2019activit\u00e9, le fournisseur de cloud peut allouer de nouvelles ressources \u00e0 ses clients. En cas de fluctuation d\u2019activit\u00e9 \u00e0 la baisse, le cloud public offre la possibilit\u00e9 de r\u00e9duire les ressources non utilis\u00e9es.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">D\u00e9l\u00e9gation de la gestion serveur<\/h4>\n\n\n\n<p>En choisissant un cloud public, les clients se d\u00e9chargent du processus de maintenance. C\u2019est en effet le fournisseur de cloud qui prend en charge la maintenance du mat\u00e9riel sur lequel repose le cloud, et assure notamment la gestion du logiciel de virtualisation.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Paiement \u00e0 l\u2019usage<\/h4>\n\n\n\n<p>D\u2019un point de vue financier, le choix d\u2019un cloud public peut s\u2019av\u00e9rer int\u00e9ressant pour les organisations, qui n\u2019ont plus \u00e0 r\u00e9aliser de co\u00fbteux investissements pour accueillir leurs propres infrastructures informatiques \u00ab&nbsp;sur site&nbsp;\u00bb. <\/p>\n\n\n\n<p>Avec un mod\u00e8le de tarification \u00e0 l\u2019usage, les clients paient uniquement les ressources et services qu\u2019ils utilisent r\u00e9ellement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quelques inconv\u00e9nients du cloud public<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Complexit\u00e9 des mod\u00e8les de tarification du cloud<\/h4>\n\n\n\n<p>S\u2019il est s\u00e9duisant pour les organisations, le mod\u00e8le de tarification \u00e0 l\u2019usage cache cependant des mod\u00e8les de tarification de plus en plus complexes \u00e0 ma\u00eetriser. <\/p>\n\n\n\n<p>Entre les co\u00fbts cach\u00e9s, les risques de sur-dimensionnement ou encore la difficult\u00e9 \u00e0 comprendre clairement les frais factur\u00e9s, le suivi des d\u00e9penses li\u00e9es au cloud public n\u2019est pas toujours simple \u00e0 r\u00e9aliser.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Inqui\u00e9tudes autour de la s\u00e9curit\u00e9 des donn\u00e9es stock\u00e9es en cloud<\/h4>\n\n\n\n<p>La question de la s\u00e9curit\u00e9 est souvent consid\u00e9r\u00e9e comme l\u2019un des principaux d\u00e9fauts du cloud public. Les principaux fournisseurs de cloud public sont \u00e0 ce jour des acteurs US. <\/p>\n\n\n\n<p>Ces fournisseurs appliquent donc leur propre r\u00e9glementation en mati\u00e8re de <a href=\"https:\/\/pp2.oodrive.com\/fr\/blog\/securite\/securite-donnees-definition-enjeux\/\">s\u00e9curit\u00e9 et de confidentialit\u00e9 des donn\u00e9es<\/a>, faisant fi de la r\u00e9glementation fran\u00e7aise.<\/p>\n\n\n\n<p>Les organisations fran\u00e7aises sont soumises \u00e0 des exigences de plus en plus fortes en mati\u00e8re de protection des donn\u00e9es, et la France dispose d\u2019ailleurs d\u2019une l\u00e9gislation parmi les plus strictes au monde sur ce point. <\/p>\n\n\n\n<section class=\"product__section ebook\" id=\"snc-banner\"><div class=\"product__section-container\"><p class=\"product__section-title\">Passez \u00e0 la vitesse SecNumCloud<\/p><p class=\"product__section-description\">Prot\u00e9gez et s\u00e9curisez vos donn\u00e9es sensibles gr\u00e2ce au SecNumCloud<\/p><\/div><div class=\"product__section-link\"><img decoding=\"async\" src=\"..\/..\/..\/..\/wp-content\/plugins\/oodrive-blog-banners\/src\/img\/ebook-snc.svg\" class=\"product__section-logo\" alt=\"oodrive snc\"\/><div class=\"cta\"><a href=\"https:\/\/pp2.oodrive.com\/fr\/livre-blanc\/secnumcloud-le-cloud-en-toute-confiance\/\">T\u00e9l\u00e9charger l&rsquo;ebook<\/a><\/div><\/div><\/section>\n\n\n\n<p>Le choix d\u2019un cloud public soul\u00e8ve des questions de confiance et de conformit\u00e9. Il s\u2019av\u00e8re peu adapt\u00e9 \u00e0 des organisations soumises \u00e0 des r\u00e8gles de conformit\u00e9 sp\u00e9cifiques et traitant des donn\u00e9es sensibles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cloud public, cloud priv\u00e9, cloud hybride&nbsp;: quelles diff\u00e9rences&nbsp;?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Une technologie commune aux trois types de cloud<\/h3>\n\n\n\n<p>D\u2019un point de vue technologique, le cloud public, le cloud priv\u00e9 et le cloud hybride reposent sur les m\u00eames socles. Tous les trois s\u2019appuient sur des technologies de virtualisation des ressources.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le cloud priv\u00e9 est d\u00e9di\u00e9 \u00e0 un seul utilisateur, qui assure sa gestion et sa maintenance.<\/li>\n\n\n\n<li>Le cloud public s\u2019appuie sur des ressources mises \u00e0 disposition et partag\u00e9es entre plusieurs utilisateurs.<\/li>\n\n\n\n<li>Le <a href=\"https:\/\/pp2.oodrive.com\/fr\/blog\/innovation\/le-cloud-hybride-une-troisieme-voie-pour-vos-donnees\/\">cloud hybride<\/a> est un mod\u00e8le mixte qui combine au moins deux environnements cloud interconnect\u00e9s.<\/li>\n<\/ul>\n\n\n\n<p>Le choix de l\u2019un ou l\u2019autre mod\u00e8le de cloud computing d\u00e9pend des besoins et contraintes propres \u00e0 chaque organisation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Souplesse, maintenance, co\u00fbt&nbsp;: d\u2019importantes diff\u00e9rences<\/h3>\n\n\n\n<p>Le cloud public offre une grande souplesse et une forte \u00e9volutivit\u00e9, permettant de faire face avec r\u00e9activit\u00e9 \u00e0 d\u2019\u00e9ventuels pics d\u2019activit\u00e9 (\u00e0 la hausse comme \u00e0 la baisse) en faisant \u00e9voluer les ressources. Le cloud priv\u00e9 n\u2019est pas aussi souple.<\/p>\n\n\n\n<p>Le <a href=\"https:\/\/pp2.oodrive.com\/fr\/blog\/securite\/cloud-prive\/\">cloud priv\u00e9<\/a> est g\u00e9n\u00e9ralement consid\u00e9r\u00e9 comme une solution plus co\u00fbteuse que le cloud public. \u00c0 l\u2019inverse, le cloud public repr\u00e9sente en th\u00e9orie la solution la plus int\u00e9ressante financi\u00e8rement, puisque le client ne prend pas en charge les co\u00fbts li\u00e9s \u00e0 la gestion de l\u2019infrastructure, et n\u2019a pas \u00e0 se pr\u00e9occuper de sa maintenance.<\/p>\n\n\n\n<p>Un \u00e9l\u00e9ment de taille pour les organisations qui ne disposent de toute fa\u00e7on pas des ressources (\u00e0 la fois financi\u00e8res et humaines) pour assurer seules la gestion de leurs infrastructures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Des garanties de s\u00e9curit\u00e9 in\u00e9gales<\/h3>\n\n\n\n<p>D\u2019un point de vue de la s\u00e9curit\u00e9, cloud public, cloud priv\u00e9 et cloud hybride n\u2019offrent pas les m\u00eames garanties. <\/p>\n\n\n\n<p>Les architectures des cloud publics \u00e9tant mutualis\u00e9es, elles sont g\u00e9n\u00e9ralement consid\u00e9r\u00e9es comme moins bien s\u00e9curis\u00e9es que celles des cloud priv\u00e9s. <\/p>\n\n\n\n<p>De plus en plus d\u2019organisations sont r\u00e9ticentes \u00e0 utiliser exclusivement le cloud public pour le stockage de leurs donn\u00e9es, en particulier leurs donn\u00e9es sensibles.<\/p>\n\n\n\n<p>Quant au cloud hybride, il appara\u00eet de plus en plus comme un bon compromis pour les organisations qui souhaitent b\u00e9n\u00e9ficier d\u2019infrastructures \u00e9volutives et garder le contr\u00f4le sur leur environnement cloud, sans sacrifier pour autant la s\u00e9curit\u00e9 de leurs donn\u00e9es. <\/p>\n\n\n\n<p>Les donn\u00e9es sensibles et les sauvegardes peuvent \u00eatre stock\u00e9es au sein d\u2019un cloud priv\u00e9, quand les donn\u00e9es consid\u00e9r\u00e9es comme moins sensibles peuvent \u00eatre g\u00e9r\u00e9es au sein d\u2019un cloud public.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cloud public&nbsp;: les 3 points cl\u00e9s \u00e0 retenir<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Solution flexible et accessible<\/strong>, le cloud public s\u2019appuie sur une mutualisation des ressources entre les diff\u00e9rents utilisateurs, chacun disposant d\u2019un espace de stockage d\u00e9di\u00e9.<\/li>\n\n\n\n<li>Le <strong>mod\u00e8le de tarification \u00e0 l\u2019usage du cloud<\/strong> est consid\u00e9r\u00e9 comme avantageux d\u2019un point de vue financier, mais il peut cependant s\u2019av\u00e9rer complexe \u00e0 ma\u00eetriser.<\/li>\n\n\n\n<li>Les <strong>diff\u00e9rents types de cloud <\/strong>(cloud public, cloud priv\u00e9, cloud hybride) n\u2019offrent pas les m\u00eames garanties en mati\u00e8re de s\u00e9curit\u00e9 des donn\u00e9es.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u2019elles soient publiques ou priv\u00e9es, les organisations s\u2019appuient d\u00e9sormais massivement sur le cloud computing pour stocker et partager leurs ressources num\u00e9riques. Derri\u00e8re cette appellation \u00ab&nbsp;cloud&nbsp;\u00bb se cachent en r\u00e9alit\u00e9 diff\u00e9rents types d\u2019environnements&nbsp;: cloud public, cloud priv\u00e9, cloud hybride. Le choix de l\u2019un ou l\u2019autre type de cloud par les d\u00e9partements IT d\u00e9pend des besoins et [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":3696568,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[574],"class_list":["post-3695767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-securite"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce qu&#039;un cloud public ?<\/title>\n<meta name=\"description\" content=\"Le cloud public est une infrastructure informatique d\u00e9tenue, g\u00e9r\u00e9e et maintenue par un fournisseur de services cloud.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta 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