{"guid":"41524d50-3344-2020-2020-202020202020","title":"What happens on a protocol level when I switch on my phone?","subtitle":null,"slug":"ARMP3D","link":"https://c3voc.de","description":"Protocol Analysis of what actually happens on the cellular protocol layers when you switch on a (2G/3G) phone.\n\nMost hackers gernerally have a pretty good idea what happens on a protocol level when TCP is established, how ARP works and how the start of a HTTP connection looks like.  But what about the time your cellphone registers to the (2G/3G) cellular network?  This talk will be a step-by-step walk-through on what your phone is doing.  \n\nTo reduce complexity, only 2G/3G is presented in this talk, leaving 4G for a later incarnation.\n\nThis will be a quite technical talk, but it targets people with no or low existing background knowledge on cellular systems or protocols.","original_language":"deu","persons":["Harald Welte"],"tags":["eh18","61"],"view_count":574,"promoted":false,"date":"2018-04-01T00:00:00.000+02:00","release_date":"2018-04-02T02:00:00.000+02:00","updated_at":"2026-03-14T21:45:08.889+01:00","length":3772,"duration":3772,"thumb_url":"https://static.media.ccc.de/media/conferences/eh2018/61-hd.jpg","poster_url":"https://static.media.ccc.de/media/conferences/eh2018/61-hd_preview.jpg","timeline_url":"https://static.media.ccc.de/media/conferences/eh2018/41524d50-3344-2020-2020-202020202020-timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/conferences/eh2018/41524d50-3344-2020-2020-202020202020-thumbnails.vtt","frontend_link":"https://media.ccc.de/v/ARMP3D","url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_title":"Easterhegg 2018","conference_url":"https://api.media.ccc.de/public/conferences/eh18","related":[{"event_id":5221,"event_guid":"58524548-4a4c-2020-2020-202020202020","weight":17},{"event_id":5222,"event_guid":"42464643-3358-2020-2020-202020202020","weight":22},{"event_id":5228,"event_guid":"44434a47-4b41-2020-2020-202020202020","weight":25},{"event_id":5229,"event_guid":"53464646-4151-2020-2020-202020202020","weight":29},{"event_id":5231,"event_guid":"38433858-5443-2020-2020-202020202020","weight":19},{"event_id":5233,"event_guid":"4a433356-4456-2020-2020-202020202020","weight":46},{"event_id":5235,"event_guid":"52535255-5245-2020-2020-202020202020","weight":21},{"event_id":5239,"event_guid":"524a3859-5641-2020-2020-202020202020","weight":16},{"event_id":5240,"event_guid":"39474e46-4733-2020-2020-202020202020","weight":33},{"event_id":5244,"event_guid":"4a473753-5039-2020-2020-202020202020","weight":27},{"event_id":5245,"event_guid":"56385739-444c-2020-2020-202020202020","weight":16}],"recordings":[{"size":384,"length":3772,"mime_type":"video/mp4","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_hd.mp4","state":"new","folder":"h264-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2018-04-02T02:21:30.665+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/h264-hd/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_hd.mp4","url":"https://api.media.ccc.de/public/recordings/24310","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"},{"size":43,"length":3760,"mime_type":"audio/opus","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_opus.opus","state":"new","folder":"opus","high_quality":false,"width":0,"height":0,"updated_at":"2018-04-02T02:25:38.863+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/opus/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_opus.opus","url":"https://api.media.ccc.de/public/recordings/24311","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"},{"size":57,"length":3760,"mime_type":"audio/mpeg","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_mp3.mp3","state":"new","folder":"mp3","high_quality":false,"width":0,"height":0,"updated_at":"2018-04-02T02:26:11.418+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/mp3/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_mp3.mp3","url":"https://api.media.ccc.de/public/recordings/24312","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"},{"size":131,"length":3772,"mime_type":"video/mp4","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_sd.mp4","state":"new","folder":"h264-sd","high_quality":false,"width":720,"height":576,"updated_at":"2018-04-02T02:38:13.298+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/h264-sd/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_sd.mp4","url":"https://api.media.ccc.de/public/recordings/24313","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"},{"size":198,"length":3772,"mime_type":"video/webm","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_webm-sd.webm","state":"new","folder":"webm-sd","high_quality":false,"width":720,"height":576,"updated_at":"2018-04-02T02:41:41.095+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/webm-sd/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_webm-sd.webm","url":"https://api.media.ccc.de/public/recordings/24314","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"},{"size":537,"length":3772,"mime_type":"video/webm","language":"deu","filename":"eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_webm-hd.webm","state":"new","folder":"webm-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2018-04-02T03:59:21.838+02:00","recording_url":"https://cdn.media.ccc.de/events/eh2018/webm-hd/eh18-61-deu-What_happens_on_a_protocol_level_when_I_switch_on_my_phone_webm-hd.webm","url":"https://api.media.ccc.de/public/recordings/24320","event_url":"https://api.media.ccc.de/public/events/41524d50-3344-2020-2020-202020202020","conference_url":"https://api.media.ccc.de/public/conferences/eh18"}]}