{"id":181791,"date":"2026-05-29T02:48:54","date_gmt":"2026-05-29T00:48:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opredelenie-poseshhaemyh-sajtov-cherez-analiz-aktivnosti-ssd-iz-web-brauzera"},"modified":"2026-05-29T02:48:54","modified_gmt":"2026-05-29T00:48:55","slug":"opredelenie-poseshhaemyh-sajtov-cherez-analiz-aktivnosti-ssd-iz-web-brauzera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/opredelenie-poseshhaemyh-sajtov-cherez-analiz-aktivnosti-ssd-iz-web-brauzera","title":{"rendered":"Ur\u010den\u00ed nav\u0161t\u011bvovan\u00fdch webov\u00fdch str\u00e1nek prost\u0159ednictv\u00edm anal\u00fdzy aktivity SSD z webov\u00e9ho prohl\u00ed\u017ee\u010de","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Skupina v\u00fdzkumn\u00edk\u016f z Technick\u00e9 univerzity v Grazu (Rakousko) vyvinula techniku \u00fatoku drobn\u00fdmi kan\u00e1ly FROST (Fingerprinting Remotely using OPFS-based SSD Timing), kter\u00e1 umo\u017e\u0148uje ur\u010dit otev\u00edran\u00e9 webov\u00e9 str\u00e1nky u\u017eivatel\u016f s p\u0159esnost\u00ed 88,95 % a tak\u00e9 spu\u0161t\u011bn\u00e9 aplikace v syst\u00e9mu s p\u0159esnost\u00ed 95,83 % prost\u0159ednictv\u00edm anal\u00fdzy aktivity SSD \u00falo\u017ei\u0161t\u011b z JavaScriptov\u00e9ho k\u00f3du b\u011b\u017e\u00edc\u00edho v prohl\u00ed\u017ee\u010di. Tato metoda m\u016f\u017ee b\u00fdt tak\u00e9 pou\u017eit\u00e1 k organizaci skryt\u00e9ho komunika\u010dn\u00edho kan\u00e1lu mezi lok\u00e1ln\u011b b\u011b\u017e\u00edc\u00ed aplikac\u00ed a JavaScriptov\u00fdm k\u00f3dem v prohl\u00ed\u017ee\u010di. P\u0159enosov\u00e1 rychlost takov\u00e9 v\u00fdm\u011bny dat v syst\u00e9mu Linux dos\u00e1hla 661 bit\/s, zat\u00edmco v macOS to bylo 892 bit\/s.<\/p>\n

\u00datok je zalo\u017een na tom, \u017ee charakter zm\u011bny doby p\u0159\u00edstupu k SSD \u00falo\u017ei\u0161ti p\u0159i otev\u00edr\u00e1n\u00ed webov\u00e9 str\u00e1nky nebo spu\u0161t\u011bn\u00ed webov\u00e9 aplikace je specifick\u00fd pro konkr\u00e9tn\u00ed str\u00e1nku a aplikaci. Pou\u017eit\u00edm typick\u00fdch otisk\u016f zm\u011bn doby p\u0159\u00edstupu pro p\u0159edem zm\u011b\u0159en\u00e9 str\u00e1nky a aplikace lze izolovat jejich charakteristickou aktivitu na pozad\u00ed jin\u00fdch operac\u00ed vstupu\/v\u00fdstupu. V kontextu realizovan\u00e9ho \u00fatoku se pro porovn\u00e1n\u00ed zpo\u017ed\u011bn\u00ed p\u0159i vstupu\/v\u00fdstupu pou\u017eij\u00ed podpisy str\u00e1nek a aplikac\u00ed.
\nByla nasazena konvolu\u010dn\u00ed neuronov\u00e1 s\u00ed\u0165, schopn\u00e1 rozpozn\u00e1vat vzory na pozad\u00ed \u0161umu od extern\u00edho vstupu\/v\u00fdstupu.<\/p>\n

Pro fungov\u00e1n\u00ed metody v prohl\u00ed\u017ee\u010di byl pou\u017eit API OPFS (Origin-Private FileSystem), kter\u00fd umo\u017e\u0148uje vytv\u00e1\u0159et soubory v lok\u00e1ln\u00edm souborov\u00e9m syst\u00e9mu (soubory jsou vytv\u00e1\u0159eny v izolovan\u00e9 \u010d\u00e1sti souborov\u00e9ho syst\u00e9mu p\u0159idru\u017een\u00e9 k webov\u00e9 str\u00e1nce). Anal\u00fdza doby p\u0159\u00edstupu k SSD \u00falo\u017ei\u0161ti se prov\u00e1d\u00ed m\u011b\u0159en\u00edm zpo\u017ed\u011bn\u00ed p\u0159i shodn\u00fdch operac\u00edch s daty. Aby se obch\u00e1zely vlivy na operace s cache-ov\u011b str\u00e1nkov\u00fdm souborem, je p\u0159i \u00fatoku nezbytn\u00e9 vytv\u00e1\u0159et soubory velmi velk\u00fdch rozm\u011br\u016f, p\u0159esahuj\u00edc\u00edch velikost dostupn\u00e9 opera\u010dn\u00ed pam\u011bti. <\/p>\n

Jako opat\u0159en\u00ed proti \u00fatoku se v\u00fdrobc\u016fm prohl\u00ed\u017ee\u010d\u016f doporu\u010duje \u017e\u00e1dat od u\u017eivatele samostatn\u00e9 potvrzen\u00ed p\u0159\u00edstupu k API OPFS nebo omezit maxim\u00e1ln\u00ed velikost souboru na hodnotu, kter\u00e1 nep\u0159esahuje velikost opera\u010dn\u00ed pam\u011bti. V sou\u010dasnosti Chrome a Safari umo\u017e\u0148uj\u00ed prost\u0159ednictv\u00edm API OPFS vytv\u00e1\u0159et soubory, kter\u00e9 zab\u00edraj\u00ed a\u017e 60 % dostupn\u00e9ho diskov\u00e9ho prostoru.<\/p>\n

V\u00fdvoj\u00e1\u0159i Chromium ze spole\u010dnosti Google nepova\u017euj\u00ed podobn\u00e9 \u00fatoky prost\u0159ednictv\u00edm bo\u010dn\u00edch kan\u00e1l\u016f za zranitelnosti. V\u00fdvoj\u00e1\u0159i Safari z Applu nevylu\u010duj\u00ed zaveden\u00ed metod pro ochranu p\u0159ed takov\u00fdmi \u00fatoky v budoucnu. Spole\u010dnost Mozilla uznala existenci probl\u00e9mu, ale dosud neuplatnila \u017e\u00e1dnou opravu.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0413\u0440\u0430\u0446\u0441\u043a\u043e\u0433\u043e \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 (\u0410\u0432\u0441\u0442\u0440\u0438\u044f), \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0430 \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a\u0438 \u043f\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c FROST (Fingerprinting Remotely using OPFS-based SSD Timing), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e \u0447\u0435\u0440\u0435\u0437 \u0430\u043d\u0430\u043b\u0438\u0437 \u0430\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 SSD-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f \u0438\u0437 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 JavaScript-\u043a\u043e\u0434\u0430 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0435\u043c\u044b\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c \u0441\u0430\u0439\u0442\u044b \u0441 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e 88.95%, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c\u044b\u0435 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u0441 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e 95.83%. \u041c\u0435\u0442\u043e\u0434 \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u043a\u0440\u044b\u0442\u043e\u0433\u043e \u043a\u0430\u043d\u0430\u043b\u0430 \u0441\u0432\u044f\u0437\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181791","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Stanoven\u00ed nav\u0161t\u00edven\u00fdch webov\u00fdch str\u00e1nek prost\u0159ednictv\u00edm anal\u00fdzy aktivity SSD z webov\u00e9ho prohl\u00ed\u017ee\u010de | ProHoster","description":"Skupina v\u00fdzkumn\u00edk\u016f z Technick\u00e9 univerzity Graz (Rakousko) vyvinula techniku \u00fatoku prost\u0159ednictv\u00edm bo\u010dn\u00edch kan\u00e1l\u016f FROST (Fingerprinting Remotely using OPFS-based SSD Timing), kter\u00e1 umo\u017e\u0148uje anal\u00fdzu aktivity.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/opredelenie-poseshhaemyh-sajtov-cherez-analiz-aktivnosti-ssd-iz-web-brauzera","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u0441\u0435\u0449\u0430\u0435\u043c\u044b\u0445 \u0441\u0430\u0439\u0442\u043e\u0432 \u0447\u0435\u0440\u0435\u0437 \u0430\u043d\u0430\u043b\u0438\u0437 \u0430\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 SSD \u0438\u0437 web-\u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 | ProHoster","og:description":"\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u0413\u0440\u0430\u0446\u0441\u043a\u043e\u0433\u043e \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 (\u0410\u0432\u0441\u0442\u0440\u0438\u044f), \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0430 \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a\u0438 \u043f\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c FROST (Fingerprinting Remotely using OPFS-based SSD Timing), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e \u0447\u0435\u0440\u0435\u0437 \u0430\u043d\u0430\u043b\u0438\u0437 \u0430\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/opredelenie-poseshhaemyh-sajtov-cherez-analiz-aktivnosti-ssd-iz-web-brauzera","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-05-29T00:48:55+00:00","article:modified_time":"2026-05-29T00:48:55+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/181791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=181791"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/181791\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=181791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=181791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=181791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}