{"id":75,"date":"2026-07-08T09:00:00","date_gmt":"2026-07-08T07:00:00","guid":{"rendered":"https:\/\/www.nouvel-oeil.com\/securite\/actualites\/double-authentification-entreprise-par-ou-commencer\/"},"modified":"2026-07-08T09:00:00","modified_gmt":"2026-07-08T07:00:00","slug":"double-authentification-entreprise-par-ou-commencer","status":"publish","type":"no_actu","link":"https:\/\/www.nouvel-oeil.com\/securite\/actualites\/double-authentification-entreprise-par-ou-commencer\/","title":{"rendered":"La double authentification, le geste qui co\u00fbte z\u00e9ro euro"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Un mot de passe vol\u00e9 ne sert \u00e0 rien si un deuxi\u00e8me facteur est demand\u00e9 \u00e0 la connexion. C\u2019est la seule mesure de notre liste qui co\u00fbte z\u00e9ro euro sur la quasi-totalit\u00e9 des services professionnels, et c\u2019est aussi celle qui manque le plus souvent : 26 % seulement des TPE et PME l\u2019ont activ\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Par o\u00f9 commencer, dans l\u2019ordre<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tous les comptes ne se valent pas. Nous conseillons cet ordre, qui va du plus dangereux au moins critique :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>La messagerie<\/strong>, avant tout le reste. C\u2019est par elle qu\u2019on r\u00e9initialise les mots de passe de tous les autres services : une bo\u00eete compromise ouvre tout.<\/li>\n<li><strong>La banque et les outils de paiement<\/strong>, g\u00e9n\u00e9ralement d\u00e9j\u00e0 prot\u00e9g\u00e9s, mais \u00e0 v\u00e9rifier.<\/li>\n<li><strong>Le site internet et l\u2019h\u00e9bergement<\/strong>, en particulier les comptes administrateurs.<\/li>\n<li><strong>Les outils m\u00e9tier en ligne<\/strong> : devis, comptabilit\u00e9, gestion commerciale.<\/li>\n<li><strong>Le stockage en ligne<\/strong> et les espaces de partage de fichiers.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">L\u2019\u00e9tape que tout le monde saute<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les codes de secours. Chaque service en propose une liste au moment de l\u2019activation, et presque personne ne la conserve. Le jour o\u00f9 quelqu\u2019un change de t\u00e9l\u00e9phone ou le perd, c\u2019est cette liste qui \u00e9vite une demi-journ\u00e9e bloqu\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nous les imprimons, nous les rangeons dans le coffre de l\u2019entreprise, et nous notons noir sur blanc qui a acc\u00e8s \u00e0 quoi. \u00c7a prend dix minutes et \u00e7a \u00e9vite l\u2019incident le plus banal du sujet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce qui fait r\u00e2ler, et comment l\u2019\u00e9viter<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La plainte est toujours la m\u00eame : \u00ab je dois sortir mon t\u00e9l\u00e9phone \u00e0 chaque fois \u00bb. Dans la grande majorit\u00e9 des cas, c\u2019est un r\u00e9glage laiss\u00e9 par d\u00e9faut. La plupart des services permettent de marquer un appareil comme fiable pendant trente jours, ce qui ram\u00e8ne la contrainte \u00e0 une confirmation par mois et par poste.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Deuxi\u00e8me source de friction : l\u2019application d\u2019authentification impos\u00e9e \u00e0 des gens qui n\u2019en veulent pas sur leur t\u00e9l\u00e9phone personnel. Une cl\u00e9 physique, ou un code envoy\u00e9 par SMS quand rien d\u2019autre n\u2019est possible, vaut mieux qu\u2019un refus g\u00e9n\u00e9ral. Le mieux est l\u2019ennemi du fait.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Notre position<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Une protection que l\u2019\u00e9quipe contourne ne prot\u00e8ge personne. Nous pr\u00e9f\u00e9rons activer la double authentification sur cinq comptes et que \u00e7a tienne, plut\u00f4t que sur vingt et que tout le monde trouve une combine au bout de trois semaines.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Elle est gratuite sur presque tous les services, elle bloque la majorit\u00e9 des intrusions, et seules 26 % des TPE et PME l\u2019ont activ\u00e9e. Voil\u00e0 comment s\u2019y prendre sans braquer l\u2019\u00e9quipe.<\/p>\n","protected":false},"featured_media":49,"template":"","no_actu_theme":[13],"class_list":["post-75","no_actu","type-no_actu","status-publish","has-post-thumbnail","no_actu_theme-bonnes-pratiques"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La double authentification, le geste qui co\u00fbte z\u00e9ro euro - Nouvel \u0152il Cyber<\/title>\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=\"La double authentification, le geste qui co\u00fbte z\u00e9ro euro - Nouvel \u0152il Cyber\" \/>\n<meta property=\"og:description\" content=\"Elle est gratuite sur presque tous les services, elle bloque la majorit\u00e9 des intrusions, et seules 26 % des TPE et PME l\u2019ont activ\u00e9e. 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