{"id":4750,"date":"2026-05-26T09:53:36","date_gmt":"2026-05-26T07:53:36","guid":{"rendered":"https:\/\/computershop.eu\/blog\/?p=4737"},"modified":"2026-05-26T10:10:24","modified_gmt":"2026-05-26T08:10:24","slug":"les-routeurs-modernes-peuvent-devenir-des-outils-de-surveillance-par-wi-fi","status":"publish","type":"post","link":"https:\/\/computershop.eu\/blog\/fr\/les-routeurs-modernes-peuvent-devenir-des-outils-de-surveillance-par-wi-fi","title":{"rendered":"Les routeurs modernes peuvent devenir des outils de surveillance par Wi-Fi"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">La technologie Wi-Fi est pr\u00e9sente presque partout : dans les logements, bureaux, caf\u00e9s, h\u00f4tels et espaces publics. Cependant, une nouvelle recherche attire l&#8217;attention sur un risque majeur de confidentialit\u00e9 : les routeurs modernes pourraient devenir des outils de <strong>surveillance par Wi-Fi<\/strong>, capables d&#8217;identifier et de suivre des personnes sans l&#8217;aide de cam\u00e9ras vid\u00e9o et m\u00eame sans qu&#8217;elles portent un t\u00e9l\u00e9phone ou un autre dispositif connect\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La d\u00e9couverte vient de chercheurs de l&#8217;<a href=\"https:\/\/www.kit.edu\/kit\/english\/pi_2025_069_the-spy-who-came-in-from-the-wifi-beware-of-radio-network-surveillance.php\" target=\"_blank\" rel=\"noreferrer noopener\">Institut de technologie de Karlsruhe<\/a> et se base sur le fonctionnement de la technologie Wi-Fi moderne.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment fonctionne l&#8217;identification des personnes par le signal Wi-Fi ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les routeurs compatibles avec <strong>Wi-Fi 5 (802.11ac)<\/strong> et les versions plus r\u00e9centes utilisent une technologie appel\u00e9e <strong>beamforming<\/strong>, destin\u00e9e \u00e0 optimiser la vitesse et la stabilit\u00e9 de la connexion. Pour ce processus, les dispositifs connect\u00e9s renvoient au routeur des informations techniques appel\u00e9es <strong>Beamforming Feedback Information (BFI)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me est que ces donn\u00e9es circulent dans l&#8217;air et, selon la recherche, peuvent \u00eatre intercept\u00e9es passivement par d&#8217;autres \u00e9quipements \u00e0 proximit\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lorsque qu&#8217;une personne se d\u00e9place dans l&#8217;espace couvert par le r\u00e9seau Wi-Fi, son corps et ses mouvements modifient la propagation des ondes radio. Ces modifications cr\u00e9ent un motif unique, une &#8220;empreinte&#8221; bas\u00e9e sur la marche et le mouvement, suffisante pour l&#8217;identification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Plus inqui\u00e9tant encore, la m\u00e9thode ne n\u00e9cessite pas d&#8217;acc\u00e8s au r\u00e9seau, de mot de passe Wi-Fi ou de compromission du routeur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La technologie de surveillance par Wi-Fi peut identifier des personnes avec une pr\u00e9cision de 99,5 %<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dans les tests r\u00e9alis\u00e9s sur <strong>197 participants<\/strong>, les chercheurs ont obtenu un taux d&#8217;identification d&#8217;environ <strong>99,5 %<\/strong>, r\u00e9ussissant \u00e0 reconna\u00eetre la m\u00eame personne lorsqu&#8217;elle traversait \u00e0 nouveau la zone surveill\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En pratique, si un syst\u00e8me avait \u00e9t\u00e9 entra\u00een\u00e9 au pr\u00e9alable \u00e0 associer le motif de marche d&#8217;une personne \u00e0 son identit\u00e9, la surveillance ult\u00e9rieure pourrait se faire sans smartphone, montre connect\u00e9e ou autre dispositif sur elle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cela change compl\u00e8tement la paradigme de la surveillance num\u00e9rique. Jusqu&#8217;\u00e0 pr\u00e9sent, les discussions sur le suivi concernaient principalement les t\u00e9l\u00e9phones mobiles, les cookies ou les cam\u00e9ras vid\u00e9o. La nouvelle approche permettrait une identification directe par la simple pr\u00e9sence dans un espace couvert par le Wi-Fi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quelles sont les implications ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les experts avertissent que la technologie pourrait avoir des implications s\u00e9rieuses sur la vie priv\u00e9e :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>la surveillance des employ\u00e9s dans les espaces de bureaux ;<\/li>\n\n\n\n<li>l&#8217;analyse du flux de personnes dans les magasins et centres commerciaux ;<\/li>\n\n\n\n<li>l&#8217;identification des visiteurs dans les espaces publics ;<\/li>\n\n\n\n<li>la collecte de donn\u00e9es comportementales sans consentement ;<\/li>\n\n\n\n<li>l&#8217;utilisation dans des syst\u00e8mes de surveillance invisible.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">De plus, les chercheurs soutiennent que tout endroit avec des routeurs modernes, caf\u00e9s, a\u00e9roports ou h\u00f4tels, pourrait th\u00e9oriquement devenir un point d&#8217;identification passive.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment la technologie de surveillance par Wi-Fi pourrait-elle \u00e9voluer \u00e0 l&#8217;avenir ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Actuellement, les utilisateurs ordinaires ont des options limit\u00e9es. \u00c9tant donn\u00e9 que le m\u00e9canisme est int\u00e9gr\u00e9 dans les normes Wi-Fi modernes, le simple changement de mot de passe ou l&#8217;utilisation d&#8217;un VPN ne supprime pas le risque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les chercheurs recommandent d&#8217;introduire des mesures suppl\u00e9mentaires de protection pour les donn\u00e9es BFI dans les futures normes Wi-Fi, y compris leur cryptage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D&#8217;ici l\u00e0, les utilisateurs peuvent adopter quelques <a href=\"https:\/\/computershop.eu\/blog\/fr\/comment-securiser-votre-reseau-wi-fi-domestique\" target=\"_blank\" rel=\"noreferrer noopener\">mesures pr\u00e9ventives<\/a> :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Mettre \u00e0 jour constamment le firmware du routeur ;<\/li>\n\n\n\n<li>D\u00e9sactiver les fonctions inutilis\u00e9es ;<\/li>\n\n\n\n<li>Utiliser des r\u00e9seaux s\u00e9par\u00e9s pour les dispositifs IoT ;<\/li>\n\n\n\n<li>\u00c9viter de se connecter inutilement \u00e0 des r\u00e9seaux publics.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Plus qu&#8217;un simple \u00e9quipement d&#8217;acc\u00e8s \u00e0 Internet<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La d\u00e9couverte montre que <strong>les routeurs Wi-Fi ne sont plus seulement des \u00e9quipements d&#8217;acc\u00e8s \u00e0 Internet<\/strong>, mais peuvent devenir des sources inattendues de collecte de donn\u00e9es sur le comportement humain.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 mesure que les technologies sans fil \u00e9voluent, la discussion sur la s\u00e9curit\u00e9 doit d\u00e9passer les mots de passe et le cryptage classique. \u00c0 l&#8217;avenir, prot\u00e9ger la vie priv\u00e9e pourrait \u00e9galement signifier contr\u00f4ler la mani\u00e8re dont les signaux radio d\u00e9crivent notre pr\u00e9sence et nos mouvements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sources : <a href=\"https:\/\/www.kit.edu\/kit\/english\/pi_2025_069_the-spy-who-came-in-from-the-wifi-beware-of-radio-network-surveillance.php\" target=\"_blank\" rel=\"noreferrer noopener\">www.kit.edu<\/a>, <a href=\"https:\/\/publikationen.bibliothek.kit.edu\/1000185756\" target=\"_blank\" rel=\"noreferrer noopener\">publikationen.bibliothek.kit.edu<\/a><\/p>\n\t<div class=\"quickshare-container\">\r\n\t<ul class=\"quickshare-genericons monochrome quickshare-effect-expand\">\r\n\t\t<li class=\"quickshare-share\">Share:<\/li> \r\n\t\t<li><a 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Cependant, une nouvelle recherche attire l&#8217;attention sur un risque majeur de confidentialit\u00e9 : les routeurs modernes pourraient devenir des outils de surveillance par &hellip; <a href=\"https:\/\/computershop.eu\/blog\/fr\/les-routeurs-modernes-peuvent-devenir-des-outils-de-surveillance-par-wi-fi\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4746,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[111],"tags":[3599,17889,9491,17892,17886,648,17895],"class_list":["post-4750","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","tag-routeur-sans-fil","tag-routeur-wi-fi","tag-securite-wi-fi","tag-surveillance-par-wi-fi","tag-surveillance-sans-fil","tag-technologie-fr","tag-technologie-beamforming"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - 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