During the break I attended the 31st Chaos Communications Congress (31C3) in Hamburg, Germany. There I had the pleasure of giving a presentation on “DP5: PIR for Privacy-preserving Presence” along with my colleague from Waterloo, Ian Goldberg. The Audio/Video Chaos Angels did a nice job of capturing the event, and making it available for all to view (I come in at 26:23).
Other resources around DP5 include: