{"id":85403,"date":"2021-07-01T18:02:52","date_gmt":"2021-07-01T16:02:52","guid":{"rendered":"https:\/\/blog.wildix.com\/tls-1-2-and-you-why-you-need-to-upgrade-your-security\/"},"modified":"2021-08-26T17:37:48","modified_gmt":"2021-08-26T15:37:48","slug":"tls-1-2-and-you-why-you-need-to-upgrade-your-security","status":"publish","type":"post","link":"https:\/\/blog.wildix.com\/fr\/tls-1-2-and-you-why-you-need-to-upgrade-your-security\/","title":{"rendered":"TLS 1.2 et vous : Pourquoi vous devez mettre votre s\u00e9curit\u00e9 \u00e0 jour"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<strong>Si vous utilisez des appareils qui ex\u00e9cutent TLS 1.0 ou 1.1, il est imp\u00e9ratif de les remplacer.<\/strong>[\/vc_column_text][vc_single_image image=\u00a0\u00bb85290&Prime; img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][vc_column_text]Les techniques de piratage devenant de plus en plus efficaces, <strong>il est essentiel que votre s\u00e9curit\u00e9 UCC soit constamment mise \u00e0 jour pour rester dans la course<\/strong>. Cela vaut \u00e9galement pour l&rsquo;un des syst\u00e8mes les plus anciens de protection des r\u00e9seaux de communication : <strong>TLS<\/strong>.<\/p>\n<p>Abr\u00e9viation de <strong>\u00ab\u00a0Transport Layer Security\u00a0\u00bb (S\u00e9curit\u00e9 de la Couche de Transport<\/strong>), TLS est un protocole de s\u00e9curit\u00e9 qui rend les communications illisibles pour les personnes qui les interceptent &#8211; <strong>mais <\/strong><strong><i>seulement<\/i><\/strong><strong> s&rsquo;il s&rsquo;agit d&rsquo;une version \u00e0 jour<\/strong>. Il est essentiel de le pr\u00e9ciser car, en raison de l&rsquo;am\u00e9lioration du piratage du code par les hackers<strong>, les versions les plus anciennes de TLS, 1.0 et 1.1, sont d\u00e9sormais vuln\u00e9rables aux attaques.<\/strong><\/p>\n<p>Malheureusement, cela signifie que <strong>tous les appareils qui utilisent encore TLS 1.0 ou 1.1 mettent en p\u00e9ril la s\u00e9curit\u00e9 de l&rsquo;ensemble de votre r\u00e9seau<\/strong>. Comme de nombreux appareils utilisant ces versions ne peuvent pas \u00eatre mis \u00e0 jour, <strong>vous devez imm\u00e9diatement remplacer tout mat\u00e9riel utilisant TLS 1.0 ou 1.1 par des mod\u00e8les utilisant une version plus fiable, TLS 1.2.<\/strong><\/p>\n<p>Vous pouvez retrouver <strong>les appareils Wildix \u00e9tant en fin de commercialisation en raison de probl\u00e8mes TLS<\/strong><a href=\"https:\/\/confluence.wildix.com\/display\/DOC\/List+of+Wildix+devices+EOL+that+do+not+support+TLS+1.2\"> ici.<\/a><\/p>\n<p>Pour expliquer <strong>pourquoi il est si crucial de mettre \u00e0 jour tout mat\u00e9riel utilisant TLS 1.0\/1.1<\/strong>, nous allons aborder le sujet plus en d\u00e9tail.[\/vc_column_text][vc_column_text]<\/p>\n<h3>Qu\u2019est-ce que TLS ?<\/h3>\n<p>[\/vc_column_text][vc_column_text]TLS est une proc\u00e9dure de s\u00e9curit\u00e9 utilis\u00e9e entre deux parties &#8211; un client et un serveur &#8211; lors de l&rsquo;\u00e9change d&rsquo;informations sur l&rsquo;internet.<\/p>\n<p>Cette proc\u00e9dure commence par l&rsquo;identification du client et du serveur, puis l&rsquo;accord sur un code priv\u00e9 et un code partag\u00e9 \u00e0 utiliser dans un processus appel\u00e9 \u00ab\u00a0handshake (poign\u00e9e de main)\u00a0\u00bb. Apr\u00e8s cela, <strong>la connexion est s\u00e9curis\u00e9e car le client et le serveur communiquent au moyen de techniques cryptographiques avanc\u00e9es<\/strong>, ce qui signifie qu&rsquo;ils sont les seuls \u00e0 pouvoir les comprendre.<\/p>\n<p>En bref, <strong>TLS code les donn\u00e9es en ligne de telle sorte que m\u00eame si un hacker s&rsquo;introduisait dans votre r\u00e9seau pour \u00e9couter, il ne pourrait ni comprendre ni d\u00e9coder vos informations.<\/strong>\u00a0[\/vc_column_text][vc_column_text]<\/p>\n<h3>Qu&rsquo;est-ce qui est diff\u00e9rent dans TLS 1.2 ?<\/h3>\n<p>[\/vc_column_text][vc_column_text]L&rsquo;une des faiblesses inh\u00e9rentes \u00e0 TLS est que la s\u00e9curit\u00e9 qu&rsquo;il offre se r\u00e9sume \u00e0 un chiffrement s\u00fbr.<strong> De par sa conception, TLS n&rsquo;est s\u00fbr que si ses codes ne peuvent \u00eatre d\u00e9chiffr\u00e9s par une personne ext\u00e9rieure.<\/strong><\/p>\n<p>Malheureusement, c&rsquo;est exactement le probl\u00e8me de TLS 1.0 et 1.1 :<strong> les codes de chiffrement cr\u00e9\u00e9s par ces protocoles peuvent \u00eatre d\u00e9cod\u00e9s par une partie ext\u00e9rieure.<\/strong><\/p>\n<p>Le probl\u00e8me r\u00e9side <strong>dans les m\u00e9thodes de cryptage utilis\u00e9es par TLS 1.0 et 1.1<\/strong>, en particulier un moyen de codage (appel\u00e9 \u00ab\u00a0algorithme de hachage\u00a0\u00bb) connu sous le nom de <strong>SHA-1<\/strong>. \u00c0 l&rsquo;heure actuelle,<a href=\"https:\/\/www.ntu.edu.sg\/news?listingKeyword=&amp;sort=latest&amp;categories=all&amp;page=1&amp;news=ffbd7ab8-233f-42e2-9107-da8dbe784aae\"> les codes g\u00e9n\u00e9r\u00e9s par SHA-1 peuvent \u00eatre craqu\u00e9s avec des outils assez rudimentaires<\/a>, ce qui signifie que <strong>les hackers peuvent potentiellement intercepter les conversations crypt\u00e9es avec TLS 1.0 ou 1.1.<\/strong><\/p>\n<p>TLS 1.2 a \u00e9t\u00e9 con\u00e7u pour corriger ce type de faille dans la cryptographie. Plut\u00f4t que d&rsquo;utiliser SHA-1, <strong>TLS 1.2 utilise l&rsquo;algorithme de hachage actualis\u00e9 SHA-256, qui reste suffisamment complexe et s\u00fbr pour ne pas \u00eatre pirat\u00e9.\u00a0<\/strong><\/p>\n<p>En ce qui concerne la s\u00e9curit\u00e9, la diff\u00e9rence est non n\u00e9gligeable : <strong>TLS 1.2 utilise un cryptage qui ne peut pas \u00eatre cass\u00e9, tandis que TLS 1.0 et 1.1 risquent toujours d&rsquo;\u00eatre expos\u00e9s<\/strong>. En cons\u00e9quence,<a href=\"https:\/\/chromestatus.com\/feature\/5759116003770368\"> Google Chrome et d&rsquo;autres grands navigateurs ont suspendu leur prise en charge de TLS 1.0\/1.1 au d\u00e9but de 2020<\/a>, ce qui signifie qu&rsquo;<strong>y acc\u00e9der par le biais de dispositifs TLS obsol\u00e8tes peut entra\u00eener des probl\u00e8mes de compatibilit\u00e9.<\/strong>[\/vc_column_text][vc_column_text]<\/p>\n<h3>Que pourrait-il se passer si je ne proc\u00e8de pas au remplacement ?<\/h3>\n<p>[\/vc_column_text][vc_column_text]Le fait de laisser des dispositifs TLS 1.0\/1.1 UCC sur votre r\u00e9seau entra\u00eene <strong>deux sc\u00e9narios catastrophes.<\/strong><\/p>\n<p><strong>Premi\u00e8rement,<\/strong> les hackers ou autres intrus auront plus de facilit\u00e9 \u00e0 s&rsquo;immiscer dans les communications que vous envoyez sur Internet. En pratique, cela signifie que <strong>les hackers peuvent intercepter et d\u00e9crypter des appels t\u00e9l\u00e9phoniques, des vid\u00e9oconf\u00e9rences ou des messages texte, ou se faire passer pour un v\u00e9ritable utilisateur de votre r\u00e9seau et recevoir directement des communications de votre part.<\/strong><\/p>\n<p>\u00c9videmment, <strong>l&rsquo;un ou l&rsquo;autre de ces sc\u00e9narios peut facilement entra\u00eener la fuite d&rsquo;informations confidentielles, notamment d&rsquo;informations d&rsquo;entreprise, de mots de passe ou m\u00eame de donn\u00e9es financi\u00e8res<\/strong>. De plus, si l&rsquo;un ou l&rsquo;autre se produit, <strong>vous ne saurez m\u00eame pas que vos messages sont intercept\u00e9s<\/strong>, car si TLS est d\u00e9crypt\u00e9, il ne peut plus prot\u00e9ger votre syst\u00e8me.<\/p>\n<p><strong>Deuxi\u00e8mement<\/strong>, avec TLS 1.0\/1.1, des entit\u00e9s ext\u00e9rieures \u00e0 votre organisation peuvent s&rsquo;enregistrer sur vos appareils UCC en obtenant les informations d&rsquo;identification d&rsquo;un appareil. Les retomb\u00e9es de cette faille de s\u00e9curit\u00e9 peuvent \u00eatre imm\u00e9diates. <strong>Une fois sur votre r\u00e9seau, les hackers peuvent utiliser vos appareils pour passer des appels t\u00e9l\u00e9phoniques<\/strong>, ce qui, dans le pire des cas, peut entra\u00eener <strong>des milliers de dollars de frais de num\u00e9rotation internationale apr\u00e8s seulement quelques jours.<\/strong><\/p>\n<p>Une fois encore, on ne saurait trop insister sur le fait que ces deux issues sont tout \u00e0 fait possibles tant que des dispositifs TLS 1.0\/1.1 restent sur votre r\u00e9seau. <strong>La <\/strong><strong><i>seule<\/i><\/strong><strong> fa\u00e7on de vous prot\u00e9ger contre les pertes financi\u00e8res et l&rsquo;exposition de votre identit\u00e9 de cette mani\u00e8re est de passer \u00e0 TLS 1.2.<\/strong><\/p>\n<p>Pour une s\u00e9curit\u00e9 accrue sur votre r\u00e9seau, envisagez d&rsquo;utiliser <strong>Wildix, la seule plateforme sur le march\u00e9 qui est 100% s\u00e9curis\u00e9e par conception pour des communications s\u00fbres sans SBCs ou VPNs externes.<\/strong> Vous trouverez tous les d\u00e9tails sur la mani\u00e8re dont Wildix assure cette s\u00e9curit\u00e9 dans<a href=\"https:\/\/www.wildix.com\/?wpdmdl=7868974&amp;ind=1614900048322\"> notre livre blanc sur la s\u00e9curit\u00e9.<\/a><\/p>\n<p><strong><i>Pour obtenir d&rsquo;autres conseils sur la s\u00e9curit\u00e9 num\u00e9rique,<\/i><\/strong><a href=\"https:\/\/www.wildix.com\/wildix-magazine\/\"><strong><i> abonnez-vous pour recevoir gratuitement notre magazine !<\/i><\/strong><\/a>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Si vous utilisez des appareils qui ex\u00e9cutent TLS 1.0 ou 1.1, il est imp\u00e9ratif de les remplacer.[\/vc_column_text][vc_single_image image=\u00a0\u00bb85290&Prime; img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][vc_column_text]Les techniques de piratage devenant de plus en plus efficaces, il est essentiel que votre s\u00e9curit\u00e9 UCC soit constamment mise \u00e0 jour pour rester dans la course. Cela vaut \u00e9galement pour l&rsquo;un des syst\u00e8mes les plus &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/blog.wildix.com\/fr\/tls-1-2-and-you-why-you-need-to-upgrade-your-security\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;TLS 1.2 et vous : Pourquoi vous devez mettre votre s\u00e9curit\u00e9 \u00e0 jour&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":21,"featured_media":85291,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[53,80],"tags":[],"class_list":["post-85403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-fr","category-infostechniques"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pourquoi votre syst\u00e8me UCC a besoin de TLS 1.2 pour \u00eatre s\u00e9curis\u00e9<\/title>\n<meta name=\"description\" content=\"Si vous utilisez une ancienne version de TLS, vous mettez inutilement en danger la s\u00e9curit\u00e9 de votre organisation.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pourquoi votre syst\u00e8me UCC a besoin de TLS 1.2 pour \u00eatre s\u00e9curis\u00e9\" \/>\n<meta property=\"og:description\" content=\"Si vous utilisez une ancienne version de TLS, vous mettez inutilement en danger la s\u00e9curit\u00e9 de votre organisation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.wildix.com\/fr\/tls-1-2-and-you-why-you-need-to-upgrade-your-security\/\" \/>\n<meta property=\"og:site_name\" content=\"Wildix Blog\" \/>\n<meta property=\"article:publisher\" 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