{"guid":"ebeaa19d-0f2d-5587-ba8a-a94175792907","title":"The hairy issue of end to end encrypted instant messaging","subtitle":null,"slug":"oscal19-12-the_hairy_issue_of_end_to_end_encrypted_instant_messaging","link":"https://c3voc.de","description":"In XMPP there is a over 14 years of experience with end to end encryption in distributed chat systems. After 4 standards for e2e encryption, we are still not content. So what makes it so hard to come up with a good encryption standard? Well, to name some of the issues: - what is the threat model e2e encryption should protect against? - what about the metadata? - what about audit trails? - what about archives? - what about group chats? - what about multiple devices? - what about key-verification? After this talk you will never look at e2e encrypted chats in the same way again.\n\nIn XMPP there is a over 14 years of experience with end to end encryption in distributed chat systems. After 4 standards for e2e encryption, we are still not content. So what makes it so hard to come up with a good encryption standard? Well, to name some of the issues: - what is the threat model e2e encryption should protect against? - what about the metadata? - what about audit trails? - what about archives? - what about group chats? - what about multiple devices? - what about key-verification? After this talk you will never look at e2e encrypted chats in the same way again.","original_language":"eng","persons":["Winfried Tilanus"],"tags":["oscal2019","12","2019"],"view_count":120,"promoted":false,"date":"2019-05-18T16:40:00.000+02:00","release_date":"2020-02-11T00:00:00.000+01:00","updated_at":"2026-03-24T16:45:05.070+01:00","length":2110,"duration":2110,"thumb_url":"https://static.media.ccc.de/media/events/oscal/2019/12-hd.jpg","poster_url":"https://static.media.ccc.de/media/events/oscal/2019/12-hd_preview.jpg","timeline_url":"https://static.media.ccc.de/media/events/oscal/2019/12-hd.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/events/oscal/2019/12-hd.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/oscal19-12-the_hairy_issue_of_end_to_end_encrypted_instant_messaging","url":"https://api.media.ccc.de/public/events/ebeaa19d-0f2d-5587-ba8a-a94175792907","conference_title":"Open Source Conference Albania 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