{"id":56195,"date":"2020-02-07T00:00:00","date_gmt":"2020-02-06T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/zagolovok-x-client-data-kak-metod-identifikatsii-polzovatelej-chrome"},"modified":"2020-02-18T14:04:25","modified_gmt":"2020-02-18T11:04:25","slug":"zagolovok-x-client-data-kak-metod-identifikatsii-polzovatelej-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/zagolovok-x-client-data-kak-metod-identifikatsii-polzovatelej-chrome","title":{"rendered":"Der Header X-Client-Data als Methode zur Identifizierung von Chrome-Nutzern","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bei der Diskussion <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52182\">Initiative<\/a><\/noindex> Google \u00fcber die Vereinheitlichung des HTTP-Header-Inhalts User-Agent, wies der Entwickler des Kiwi-Browsers <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/w3ctag\/design-reviews\/issues\/467#issuecomment-581944600\">darauf hin<\/a><\/noindex> \u043d\u0430 \u043e\u0441\u0442\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0432 Chrome HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a &#171;X-Client-Data&#187;, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e <noindex><a rel=\"nofollow\" href=\"https:\/\/ec.europa.eu\/info\/law\/law-topic\/data-protection\/reform\/what-personal-data_en\">verst\u00f6\u00dft<\/a><\/noindex> gegen die in der Europ\u00e4ischen Union geltende Datenschutzgrundverordnung (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9E%D0%B1%D1%89%D0%B8%D0%B9_%D1%80%D0%B5%D0%B3%D0%BB%D0%B0%D0%BC%D0%B5%D0%BD%D1%82_%D0%BF%D0%BE_%D0%B7%D0%B0%D1%89%D0%B8%D1%82%D0%B5_%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85\">DSGVO<\/a><\/noindex>). Im Verlauf der <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22236106\">Diskussion<\/a><\/noindex> wurde auch die Ambivalenz der Ma\u00dfnahmen von Google kritisiert, die auf der einen Seite <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52189\">Ma\u00dfnahmen zur Blockierung der verdeckten Identifizierung und Verfolgung von Benutzern<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51341\">Methoden<\/a><\/noindex> propagiert, aber auf der anderen Seite sich nicht beeilt, die Unterst\u00fctzung des Headers X-Client-Data aus Chrome zu entfernen, der zur Identifizierung von Browserinstanzen bei der Nutzung von Google-Diensten verwendet werden kann.<\/p>\n<p>Der Header X-Client-Data ist keine versteckte Funktionalit\u00e4t, und sein Verhalten <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/chrome\/privacy\/whitepaper.html#variations\">beschrieben<\/a><\/noindex> findet sich in der Dokumentation. \u00dcber X-Client-Data erh\u00e4lt Google Daten \u00fcber die Aktivit\u00e4t bestimmter experimenteller Funktionen in Chrome in Bezug auf seine Websites (zum Beispiel kann Google im Laufe eines Experiments auf YouTube bestimmte Testfunktionen aktivieren, wenn sie vom Browser unterst\u00fctzt werden, oder versuchen, Probleme zuzuordnen, die bei der Aktivierung experimenteller Funktionen auftreten). <\/p>\n<p>Header <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/chromium\/chromium\/blob\/master\/components\/variations\/net\/variations_http_headers.cc#L89\">wird angezeigt<\/a><\/noindex> \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \u0441\u0430\u0439\u0442\u0430\u043c Google, \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043c\u0430\u0441\u043a\u0430\u043c &#171;*.doubleclick.net&#187;, &#171;*.googlesyndication.com&#187;, &#171;www.googleadservices.com&#187;, &#171;*.google.&lt;<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/List_of_Internet_top-level_domains\">TLD<\/a><\/noindex>&gt;&#187; \u0438  &#171;*.youtube.&lt;TLD&gt;&#187;, \u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0445 \u0447\u0435\u0440\u0435\u0437 HTTPS. \u0412 \u0440\u0435\u0436\u0438\u043c\u0435 \u0438\u043d\u043a\u043e\u0433\u043d\u0438\u0442\u043e \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a \u043d\u0435 \u0437\u0430\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f, \u043d\u043e \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u0441\u043c\u0435\u043d\u044b \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0444\u0438\u043b\u044f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u0432 Google \u043d\u0430 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u043f\u0440\u043e\u0444\u0438\u043b\u044c \u0438\u043b\u0438 \u043f\u0440\u0438 \u0432\u044b\u0437\u043e\u0432\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u043e\u0447\u0438\u0441\u0442\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a \u043d\u0435 \u0441\u0431\u0440\u0430\u0441\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0438  \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u0442\u044c\u0441\u044f \u0441 \u043f\u0440\u0435\u0436\u043d\u0438\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u043c.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580990115.png\"><img decoding=\"async\" alt=\"Der Header X-Client-Data als Methode zur Identifizierung von Chrome-Nutzern\" src=\"\/wp-content\/uploads\/2020\/02\/1510d69ab0464c6d7aed19580c88a862.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Es wird behauptet, dass der Header keine pers\u00f6nlich identifizierbaren Informationen enth\u00e4lt, sondern nur den Status der Chrome-Installation und aktive experimentelle Funktionen beschreibt. Wenn in den Einstellungen das Senden von Telemetrie zur Browsernutzung und das Generieren von Absturzberichten deaktiviert ist, werden bei der Generierung des Basiswerts des X-Client-Data-Headers nur 13 Bit Entropie (8000 verschiedene Kombinationen) verwendet, was nicht ausreicht, um eine Identifizierung zu erm\u00f6glichen. <\/p>\n<p>Da im Header auch bestimmte Einstellungen und Systemparameter kodiert sind, eignet sich der Inhalt von X-Client-Data letztendlich gut als zus\u00e4tzliche Datenquelle zur indirekten Identifikation eines Nutzers \u00fcber einen kurzen Zeitraum hinweg (experimentelle Funktionen werden im Laufe der Zeit aktiviert und deaktiviert, was zu einem periodischen Wechsel des Wertes in X-Client-Data f\u00fchrt). <\/p>\n<p>Allerdings wird neben der anf\u00e4nglichen Entropie auch eine Seed-Sequenz verwendet, die von den Google-Servern zur\u00fcckgegeben wird und von dem Land, der IP-Adresse und anderen Kriterien abh\u00e4ngt, die Google f\u00fcr wichtig erachtet (zum Beispiel gibt es keine Einschr\u00e4nkung, eine gro\u00dfe Zufallssequenz zur\u00fcckzugeben, die als pr\u00e4ziser Identifikator fungieren kann).<br \/>\n\u041a\u0440\u043e\u043c\u0435 \u0442\u043e\u0433\u043e, \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u043f\u043e \u043c\u0430\u0441\u043a\u0430\u043c \u0434\u043e\u043c\u0435\u043d\u043e\u0432 Google \u043f\u0440\u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 X-Client-Data \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0439, \u043a\u043e\u0433\u0434\u0430 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a \u043c\u043e\u0436\u0435\u0442 \u0437\u0430\u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0434\u043e\u043c\u0435\u043d \u0432\u0438\u0434\u0430 &#171;youtube.xn--55qx5d&#187; \u0438 \u043d\u0430\u0447\u0430\u0442\u044c \u0441\u043e\u0431\u0438\u0440\u0430\u0442\u044c \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52321\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0438 \u0438\u043d\u0438\u0446\u0438\u0430\u0442\u0438\u0432\u044b Google \u043f\u043e \u0443\u043d\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0430 User-Agent, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Kiwi \u043e\u0431\u0440\u0430\u0442\u0438\u043b \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u043d\u0430 \u043e\u0441\u0442\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0432 Chrome HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a &#171;X-Client-Data&#187;, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043d\u0430\u0440\u0443\u0448\u0430\u0435\u0442 \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0439 \u0432 \u0415\u0432\u0440\u043e\u0441\u043e\u044e\u0437\u0435 \u043e\u0431\u0449\u0438\u0439 \u0440\u0435\u0433\u043b\u0430\u043c\u0435\u043d\u0442 \u043f\u043e \u0437\u0430\u0449\u0438\u0442\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 (GDPR). \u0412 \u0445\u043e\u0434\u0435 \u0434\u0438\u0441\u043a\u0443\u0441\u0441\u0438\u0438 \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0434\u0432\u0435\u0440\u0433\u043b\u0430\u0441\u044c \u043a\u0440\u0438\u0442\u0438\u043a\u0435 \u0434\u0432\u043e\u0439\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0439 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0441 \u043e\u0434\u043d\u043e\u0439 \u0441\u0442\u043e\u0440\u043e\u043d\u044b \u043f\u0440\u043e\u0434\u0432\u0438\u0433\u0430\u0435\u0442 \u043c\u0435\u0442\u043e\u0434\u044b \u0434\u043b\u044f \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u043a\u0440\u044b\u0442\u043e\u0439 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u043d\u0438\u044f \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":56196,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-56195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0438 \u0438\u043d\u0438\u0446\u0438\u0430\u0442\u0438\u0432\u044b Google \u043f\u043e \u0443\u043d\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0430 User-Agent, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a 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