{"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\/hr\/kako-istekle-beskontaktne-kartice-mogu-ponovno-postati-sredstvo-placanja\/","title":{"rendered":"Kako istekle beskontaktne kartice mogu ponovno postati sredstvo pla\u0107anja?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Stru\u010dnjaci sa Sveu\u010dili\u0161ta UMass Amherst predstavili su studiju pod nazivom \u201e<a href=\"https:\/\/www.usenix.org\/system\/files\/usenixsecurity26-anwar.pdf\">Zombie kartice ponovno online: O\u017eivljavanje isteklih kreditnih kartica za beskontaktna pla\u0107anja<\/a>&quot;. Detaljno je opisano kako se istekle beskontaktne platne kartice mogu ponovno koristiti za kupnje na prodajnim mjestima.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Beskontaktna pla\u0107anja temelje se na EMV protokolu, gdje kartica ili pametni telefon komunicira s POS terminalom pomo\u0107u NFC tehnologije. Poruke zatim putuju kroz platnu mre\u017eu do banke i izdavatelja kartice. Istra\u017eiva\u010di upozoravaju da je ovaj proces ranjiv, jer se neki podaci prenose izme\u0111u kartice i terminala u ne\u0161ifriranom obliku i tek se kasnije kombiniraju s kriptografskom provjerom.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ova sigurnosna ranjivost podlo\u017ena je zlouporabi. Koriste\u0107i dva pametna telefona koji djeluju kao NFC proxy ure\u0111aji, istra\u017eiva\u010di su uspje\u0161no izveli napad tipa &quot;\u010dovjek u sredini&quot;. Otkrili su da su beskontaktne transakcije na Visa mre\u017ei ranjive na takve napade jer im nedostaje odgovaraju\u0107a za\u0161tita integriteta podataka.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Problem le\u017ei u takozvanom osnovnom EMV protokolu. Dok Mastercard, American Express i Discover koriste stro\u017ea pravila, Visa sustav je &quot;otvoreniji&quot;. Kod Visa kartica, datum isteka koji terminal o\u010ditava nije kriptografski za\u0161ti\u0107en digitalnim potpisom. Terminal provjerava datum na kartici, ali banka izdavatelj provjerava drugi dio informacije o datumu prilikom odobravanja. Budu\u0107i da ta dva dijela informacije nisu kriptografski povezana, napada\u010d mo\u017ee promijeniti informacije koje terminal vidi tijekom prijenosa, dok se ostali sigurnosni elementi \u010dine potpuno valjanima.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ho\u0107e li napad biti uspje\u0161an u praksi ovisi o pojedina\u010dnoj banci i njezinoj obradi transakcija. Me\u0111utim, takvi nalazi s pravom izazivaju sumnju u to koliko temeljito financijske institucije provjeravaju sigurnosne standarde prije nego \u0161to tehnologiju puste u \u0161iroku upotrebu. Voditelj istra\u017eivanja Raja Hasnain Anwar objasnio je da se radi o svjesnoj prilagodbi izme\u0111u visoke razine sigurnosti i brzine starijih terminala.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Autori su obavijestili Visu o ranjivosti u svibnju 2025. i ponovno u prosincu 2025. Do danas ni Visa ni bilo koja od obavije\u0161tenih banaka nisu potvrdile da su ispravile nedostatak.<\/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\/hr\/wp-json\/wp\/v2\/posts\/8059\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\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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