3 papers
cs.CR2026
FoSAM: Forward Secret Messaging in Ad-Hoc Networks
Daniel Schadt, Christoph Coijanovic, Thorsten Strufe
Apps such as Firechat and Bridgefy have been used during recent protests in Hong Kong and Iran, as they allow communication over ad-hoc wireless networks even when internet access…
cs.CR2024
Pirates: Anonymous Group Calls Over Fully Untrusted Infrastructure
Christoph Coijanovic, Akim Stark, Daniel Schadt +1
Anonymous metadata-private voice call protocols suffer from high delays and so far cannot provide group call functionality. Anonymization inherently yields delay penalties, and sca…
cs.CR2021
2PPS -- Publish/Subscribe with Provable Privacy
Sarah Abdelwahab Gaballah, Christoph Coijanovic, Thorsten Strufe +1
Publish/Subscribe systems like Twitter and Reddit let users communicate with many recipients without requiring prior personal connections. The content that participants of these sy…