{"id":89885,"date":"2015-11-30T10:24:36","date_gmt":"2015-11-30T09:24:36","guid":{"rendered":"http:\/\/www.iphone-ticker.de\/?p=89885"},"modified":"2015-11-30T10:24:36","modified_gmt":"2015-11-30T09:24:36","slug":"telegramm-messenger-laesst-rueckschluesse-auf-chat-partner-zu","status":"publish","type":"post","link":"https:\/\/www.iphone-ticker.de\/telegramm-messenger-laesst-rueckschluesse-auf-chat-partner-zu-89885\/","title":{"rendered":"Telegramm-Messenger l\u00e4sst R\u00fcckschl\u00fcsse auf Chat-Partner zu"},"content":{"rendered":"<p>Der in den vergangenen Wochen stark <a href=\"http:\/\/money.cnn.com\/2015\/11\/18\/technology\/telegram-isis-shutdown\/index.html\">kritisierte<\/a> Instant-Messenger Telegram l\u00e4sst unter Umst\u00e4nden R\u00fcckschl\u00fcsse auf eure Konversationen im Freundeskreis zu. <\/p>\n<p><a href=\"http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram.jpg\" alt=\"telegram\" width=\"500\" height=\"122\" class=\"aligncenter size-full wp-image-89886\" srcset=\"https:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram.jpg 500w, https:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram-300x73.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<h6>Telegram zeigt: Wer spricht mit wem.<\/h6>\n<p>Dies hat der Entwickler Ola Flisb\u00e4ck entdeckt und <a href=\"https:\/\/oflisback.github.io\/telegram-stalking\/\">verweist<\/a> auf frei zug\u00e4ngliche Meta-Daten von Telegram-Nutzern, die es interessierten Dritten <a href=\"https:\/\/medium.com\/@thegrugq\/operational-telegram-cbbaadb9013a#.zdgykjyik\">erm\u00f6glichen w\u00fcrden<\/a>, relativ eindeutig festzustellen, welche Anwender sich gerade in einem aktiven Gespr\u00e4ch miteinander befinden. <\/p>\n<p>So informieren die Telegram-Server dar\u00fcber, wenn Anwender die App gerade in den System-Vordergrund geholt haben und stellen die entsprechenden Meta-Informationen ungesch\u00fctzt ins Netz. <\/p>\n<blockquote><p>The Telegram android app sends a notification to all contacts when it becomes or stops being the &#8222;foreground&#8220; app on the device. Using that information alone it&#8217;s at times easy to make guesses about who&#8217;s talking to who if you have several contacts in common with a &#8222;victim&#8220;. An &#8222;attacker&#8220; will sometimes see the victim and another contact taking turns going active\/inactive as they pass messages back and forth.<\/p><\/blockquote>\n<p>Die Verf\u00fcgbarkeit der Metadaten sei besonders f\u00fcr all jene Nutzer problematisch, die ihr gesamtes Adressbuch an Telegram \u00fcbertragen h\u00e4tten. Ein Vorgang der unter Android automatisch abl\u00e4uft und unter iOS nur vom Nutzer abgenickt werden muss. <\/p>\n<p><a href=\"http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/tele700.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/tele700.jpg\" alt=\"tele700\" width=\"700\" height=\"414\" class=\"aligncenter size-full wp-image-89887\" srcset=\"https:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/tele700.jpg 700w, https:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/tele700-300x177.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n<p>Angreifer k\u00f6nnten so eindeutige Netzwerk-Verbindungen zwischen befreundeten Personen ermitteln. <\/p>\n<p>Zuletzt stand Telegram Mitte November im Rampenlicht. Nach <a href=\"http:\/\/money.cnn.com\/2015\/11\/18\/technology\/telegram-isis-shutdown\/index.html\">CNN-Informationen<\/a>, soll der WhatsApp-Konkurrent knapp 80 ISIS-spezifische Chat-Gruppen geschlossen haben<\/p>\n<div id=\"article-single-app-preview\">\n<div id=\"article-single-app-preview-icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.iphone-ticker.de\/wp-content\/plugins\/appstore-lookup\/timthumb.php?src=http:\/\/placekitten.com\/57\/57&zc=0&amp;w=72&amp;q=80\"  alt=\"App Icon\"  height=\"72\" width=\"72\" class=\"asl-icon-img\" \/><\/div>\n<div id=\"article-single-app-preview-desc\"><span class=\"name\">App Not Found<\/span><br \/>\n<span class=\"seller\">Seller Not Found<\/span><\/div>\n<a href=\"http:\/\/www.ifun.de\/app\/686449807\"><div id=\"article-single-app-preview-download\">Free<br \/>\n<span class=\"size\">19.73MB<\/span><\/div><\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<a href=\"https:\/\/www.iphone-ticker.de\/telegramm-messenger-laesst-rueckschluesse-auf-chat-partner-zu-89885\/\"><img width=\"150\" height=\"150\" src=\"https:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram-f-150x150.jpg\" class=\"alignright tfe wp-post-image\" alt=\"\" decoding=\"async\" loading=\"lazy\" \/><\/a><p>Der in den vergangenen Wochen stark kritisierte Instant-Messenger Telegram l\u00e4sst unter Umst\u00e4nden R\u00fcckschl\u00fcsse auf eure Konversationen im Freundeskreis zu. Telegram zeigt: Wer spricht mit wem. Dies hat der Entwickler Ola Flisb\u00e4ck entdeckt und verweist auf frei zug\u00e4ngliche Meta-Daten von Telegram-Nutzern, die es interessierten Dritten erm\u00f6glichen w\u00fcrden, relativ eindeutig festzustellen, welche Anwender sich gerade in einem [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":89888,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[672,32,238,3223],"class_list":["post-89885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apps","tag-datenschutz","tag-kritik","tag-security","tag-telegram"],"aioseo_notices":[],"featured_image":["http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram-f.jpg"],"rest_api_enabler":{"featured_image":"http:\/\/images.iphone-ticker.de\/wp-content\/uploads\/2015\/11\/telegram-f.jpg"},"_links":{"self":[{"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/posts\/89885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/comments?post=89885"}],"version-history":[{"count":1,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/posts\/89885\/revisions"}],"predecessor-version":[{"id":89889,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/posts\/89885\/revisions\/89889"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/media\/89888"}],"wp:attachment":[{"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/media?parent=89885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/categories?post=89885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iphone-ticker.de\/apiv2\/wp\/v2\/tags?post=89885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}