{"id":92955,"date":"2020-09-01T19:42:04","date_gmt":"2020-09-01T17:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere"},"modified":"2020-09-01T19:42:04","modified_gmt":"2020-09-01T17:42:04","slug":"identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/identifikacziya-polzovatelej-po-istorii-poseshhenij-v-brauzere","title":{"rendered":"Anv\u00e4ndaridentifiering baserat p\u00e5 webbl\u00e4sarhistorik","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Anst\u00e4llda vid Mozilla har publicerat<\/a><\/noindex> resultaten av en studie om m\u00f6jligheten att identifiera anv\u00e4ndare utifr\u00e5n deras webbl\u00e4sarbes\u00f6ksprofil, vilken kan vara synlig f\u00f6r tredje parter och webbplatser. Analysen av 52 000 bes\u00f6ksprofiler som tillhandah\u00e5llits av Firefox-anv\u00e4ndare som deltog i experimentet visade att preferenserna f\u00f6r webbplatsbes\u00f6k \u00e4r karakt\u00e4ristiska f\u00f6r varje anv\u00e4ndare och \u00e4r best\u00e4ndiga. Unikheten hos de erh\u00e5llna historikprofilerna uppgick till 99%. Dessutom bevaras en h\u00f6g grad av unikhet \u00e4ven om urvalet begr\u00e4nsas till bara hundra popul\u00e4ra webbplatser.<\/p>\n

\"Anv\u00e4ndaridentifiering<\/a><\/noindex><\/center><\/p>\n

En tv\u00e5veckors experiment unders\u00f6kte m\u00f6jligheten f\u00f6r \u00e5teridentifiering \u2013 bes\u00f6ksdata fr\u00e5n den f\u00f6rsta veckan f\u00f6rs\u00f6ktes kopplas samman med data fr\u00e5n den andra veckan. Det visade sig att 50 % av anv\u00e4ndarna som bes\u00f6kt 50 eller fler olika dom\u00e4ner kunde \u00e5teridentifieras. Vid bes\u00f6k av 150 eller fler olika dom\u00e4ner \u00f6kade \u00e5teridentifieringens t\u00e4ckning till 80 %. Kontrollen genomf\u00f6rdes p\u00e5 ett urval av 10 000 webbplatser f\u00f6r att simulera data som stora inneh\u00e5llsleverant\u00f6rer kan f\u00e5 (till exempel kan Google \u00f6vervaka \u00e5tkomsten till 9823 webbplatser av dessa 10000, Facebook till 7348, Verizon till 5500).<\/p>\n

Den angivna egenskapen g\u00f6r det m\u00f6jligt f\u00f6r stora \u00e4gare av popul\u00e4ra resurser att med h\u00f6g sannolikhet identifiera anv\u00e4ndare. Till exempel kan f\u00f6retag som Google, Facebook och Twitter, vars widgets placeras p\u00e5 externa webbplatser, teoretiskt \u00e5teridentifiera cirka 80 % av anv\u00e4ndarna.<\/p>\n

\"Anv\u00e4ndaridentifiering<\/a><\/noindex><\/center><\/p>\n

Tidigare \u00f6ppnade webbplatser kan ocks\u00e5 identifieras indirekt, till exempel genom att i JavaScript-koden iterera \u00f6ver popul\u00e4ra dom\u00e4ner och m\u00e4ta skillnaderna i latens vid resursladdning \u2013 om en webbplats nyligen har \u00f6ppnats av anv\u00e4ndaren, kommer resursen att levereras fr\u00e5n webbl\u00e4sarens cache n\u00e4stan omedelbart. Tidigare kunde CSS-egenskapen \"visited\" anv\u00e4ndas f\u00f6r att identifiera \u00f6ppnade sidor. utv\u00e4rdering<\/a><\/noindex> caching av HSTS-inst\u00e4llningar (vid \u00f6ppning av en webbplats med HSTS omdirigerades HTTP-f\u00f6rfr\u00e5gan omedelbart till HTTPS utan f\u00f6rs\u00f6k att skicka en f\u00f6rfr\u00e5gan via HTTP) och analys<\/a><\/noindex> CSS-egenskapens tillst\u00e5nd \"visited\". <\/p>\n

Liknande metoder f\u00f6r att best\u00e4mma bes\u00f6kshistorik baserat p\u00e5 CSS anv\u00e4ndes i en liknande studie, som genomf\u00f6rdes<\/a><\/noindex> Mellan 2009 och 2011 visade denna forskningsstudie att det var m\u00f6jligt att identifiera 42 % av anv\u00e4ndarna genom att kontrollera 50 sidor och 70 % genom att kontrollera 500 sidor. Forskning fr\u00e5n Mozilla. bekr\u00e4ftade<\/a><\/noindex> och preciserade slutsatserna fr\u00e5n den f\u00f6reg\u00e5ende publikation, d\u00e4r noggrannheten f\u00f6r att fastst\u00e4lla bes\u00f6kshistoriken avsev\u00e4rt f\u00f6rb\u00e4ttrades, och antalet kontrollerade dom\u00e4ner \u00f6kades fr\u00e5n 6000 till 10000 (data samlades in om totalt 660000 dom\u00e4ner, men f\u00f6r identifieringsutv\u00e4rdering anv\u00e4ndes ett urval av de 10000 mest popul\u00e4ra dom\u00e4nerna). <\/p>\n

<\/a><\/noindex><\/p>\n

K\u00e4lla: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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