> Jaap-Henk Hoepman
Contact discovery and notification. Some new privacy concerns
14 jan. 2021 - Now that many more people are joining Signal, some interesting new privacy concerns about its contact discovery and notification protocol are popping up. In particular, people are surprised other people that are (no longer) in their contact list can still discover them when the join Signal. Moreover, some people that join Signal are annoyed that other people are automatically notified of this fact.
contact-discovery · messaging · privacy · privacy-ux-tradeoff · signal