WhatsApp security and role of metadata in preserving privacy · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1701.06817/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTWhatsApp security and role of metadata in preserving privacy — mentioned by ihattendorfhttps://news.ycombinator.com/item?id=15313333urn:hackerpapers:mention:1701.06817:15313333Fri, 22 Sep 2017 16:01:36 GMT<p>It&#x27;s Facebook that has access to this metadata. &gt; While the metadata is encrypted during transit, phone numbers, timestamps, connection duration, connection frequency, as well as user location are being stored on the company’s servers [0] [0] https://arxiv.org/pdf/1701.06817.pdf</p><p><a href="https://hackerpaper.kaipfister.de/p/1701.06817/">Paper and discussion history</a>. A mention is not an endorsement.</p>cs.CR