{"id":8059,"date":"2026-08-19T11:11:30","date_gmt":"2026-08-19T09:11:30","guid":{"rendered":"https:\/\/viva.racunalniske-novice.com\/kako-lahko-potekle-brezsticne-kartice-ponovno-postanejo-placilno-sredstvo\/"},"modified":"2026-08-19T11:11:30","modified_gmt":"2026-08-19T09:11:30","slug":"kako-lahko-potekle-brezsticne-kartice-ponovno-postanejo-placilno-sredstvo","status":"publish","type":"post","link":"https:\/\/viva.racunalniske-novice.com\/fr\/comment-les-cartes-sans-contact-perimees-peuvent-elles-redevenir-un-moyen-de-paiement\/","title":{"rendered":"Comment les cartes sans contact p\u00e9rim\u00e9es peuvent-elles redevenir un moyen de paiement ?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Des experts de l&#039;universit\u00e9 UMass Amherst ont pr\u00e9sent\u00e9 une \u00e9tude intitul\u00e9e \u00ab<a href=\"https:\/\/www.usenix.org\/system\/files\/usenixsecurity26-anwar.pdf\">Les cartes zombies font leur grand retour\u00a0: elles r\u00e9utilisent les cartes de cr\u00e9dit expir\u00e9es pour les paiements sans contact<\/a>\u00ab\u00a0Il expliquait en d\u00e9tail comment les cartes de paiement sans contact p\u00e9rim\u00e9es pouvaient \u00eatre r\u00e9utilis\u00e9es pour les achats en point de vente.\u00a0\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les paiements sans contact reposent sur le protocole EMV, o\u00f9 une carte ou un smartphone communique avec un terminal de point de vente gr\u00e2ce \u00e0 la technologie NFC. Les messages transitent ensuite par le r\u00e9seau de paiement jusqu&#039;\u00e0 la banque et l&#039;\u00e9metteur de la carte. Des chercheurs mettent en garde contre la vuln\u00e9rabilit\u00e9 de ce processus, car certaines donn\u00e9es sont transmises entre la carte et le terminal sans chiffrement et ne sont chiffr\u00e9es qu&#039;ult\u00e9rieurement apr\u00e8s v\u00e9rification cryptographique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette faille de s\u00e9curit\u00e9 est exploitable. En utilisant deux smartphones comme relais NFC, les chercheurs ont r\u00e9ussi \u00e0 mener une attaque de type \u00ab\u00a0homme du milieu\u00a0\u00bb. Ils ont constat\u00e9 que les transactions sans contact sur le r\u00e9seau Visa \u00e9taient vuln\u00e9rables \u00e0 ce type d&#039;attaques en raison d&#039;un manque de protection ad\u00e9quate de l&#039;int\u00e9grit\u00e9 des donn\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me r\u00e9side dans le protocole EMV de base. Si Mastercard, American Express et Discover appliquent des r\u00e8gles plus strictes, le syst\u00e8me Visa est plus ouvert. Avec les cartes Visa, la date d&#039;expiration lue par le terminal n&#039;est pas prot\u00e9g\u00e9e par une signature num\u00e9rique. Le terminal v\u00e9rifie bien la date figurant sur la carte, mais la banque \u00e9mettrice v\u00e9rifie une autre information relative \u00e0 la date lors de l&#039;approbation. Comme ces deux informations ne sont pas li\u00e9es cryptographiquement, un attaquant peut modifier les informations vues par le terminal lors de la transmission, tandis que les autres \u00e9l\u00e9ments de s\u00e9curit\u00e9 semblent parfaitement valides.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le succ\u00e8s de cette attaque d\u00e9pendra de chaque banque et de son syst\u00e8me de traitement des transactions. Toutefois, ces r\u00e9sultats soul\u00e8vent \u00e0 juste titre des interrogations quant \u00e0 la rigueur avec laquelle les institutions financi\u00e8res v\u00e9rifient les normes de s\u00e9curit\u00e9 avant de g\u00e9n\u00e9raliser l&#039;utilisation de cette technologie. Le responsable de l&#039;\u00e9tude, Raja Hasnain Anwar, explique qu&#039;il s&#039;agit d&#039;un compromis d\u00e9lib\u00e9r\u00e9 entre un niveau de s\u00e9curit\u00e9 \u00e9lev\u00e9 et la rapidit\u00e9 des terminaux plus anciens.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les auteurs ont notifi\u00e9 Visa de la vuln\u00e9rabilit\u00e9 en mai 2025, puis \u00e0 nouveau en d\u00e9cembre 2025. \u00c0 ce jour, ni Visa ni aucune des banques notifi\u00e9es n&#039;ont confirm\u00e9 avoir corrig\u00e9 la faille.<\/p>","protected":false},"excerpt":{"rendered":"<p>Strokovnjaki z ameri\u0161ke univerze UMass Amherst so na nedavni konferenci USENIX Security 2026 predstavili raziskavo z naslovom &#8220;Zombie Cards Back Online: Reviving Expired Credit Cards for Contactless Payments&#8220;. V njej so podrobno opisali na\u010din, kako je mogo\u010de potekle brezsti\u010dne pla\u010dilne kartice znova uporabiti za nakupovanje na prodajnih mestih. Brezsti\u010dno pla\u010devanje temelji na protokolu EMV, pri [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[478,484],"class_list":["post-8059","post","type-post","status-publish","format-standard","hentry","tag-informacijska-varnost","tag-visa-kartica"],"acf":{"subtitle":"","heading":"","summary":"Raziskovalci so dokazali, da je z napadom NFC proxy mogo\u010de uporabiti potekle brezsti\u010dne kartice Visa. Zaradi odsotnosti kriptografske za\u0161\u010dite datuma poteka na kartici terminali spregledajo neveljavnost, kar omogo\u010da izvajanje nepoobla\u0161\u010denih pla\u010dil.","thumbnail_small":"https:\/\/racunalniske-novice.com\/wp-content\/uploads\/2026\/08\/ignartonosbg-visa-6947134_1920-560x315.jpg","thumbnail_large":"https:\/\/racunalniske-novice.com\/wp-content\/uploads\/2026\/08\/ignartonosbg-visa-6947134_1920-1024x683.jpg","thumbnail_caption":"Foto: Pixabay","gallery":"","video_gallery":null,"author":"","links":[{"title":"Usenix","url":"https:\/\/www.usenix.org\/system\/files\/usenixsecurity26-anwar.pdf"}],"sources":[{"title":"theregister","url":"https:\/\/www.theregister.com\/security\/2026\/08\/18\/expired-credit-cards-revived-by-researchers-to-make-unauthorized-payments\/5289229"}],"skip_language":[]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kako lahko potekle brezsti\u010dne kartice ponovno postanejo pla\u010dilno sredstvo? - Ra\u010dunalni\u0161ke novice<\/title>\n<meta name=\"description\" content=\"Raziskovalci so dokazali, da je z napadom NFC proxy mogo\u010de uporabiti potekle brezsti\u010dne kartice Visa. Zaradi odsotnosti kriptografske za\u0161\u010dite datuma poteka na kartici terminali spregledajo neveljavnos\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/viva.racunalniske-novice.com\/fr\/wp-json\/wp\/v2\/posts\/8059\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kako lahko potekle brezsti\u010dne kartice ponovno postanejo pla\u010dilno sredstvo? - Ra\u010dunalni\u0161ke novice\" \/>\n<meta property=\"og:description\" content=\"Strokovnjaki z ameri\u0161ke univerze UMass Amherst so na nedavni konferenci USENIX Security 2026 predstavili raziskavo z naslovom &#8220;Zombie Cards Back Online: Reviving Expired Credit Cards for Contactless Payments&#8220;. V njej so podrobno opisali na\u010din, kako je mogo\u010de potekle brezsti\u010dne pla\u010dilne kartice znova uporabiti za nakupovanje na prodajnih mestih. 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