3 papers
cs.CR2026
OmniSphinx: Active Mix Networks (Extended Version)
Daniel Schadt, Christoph Coijanovic, Shabi Shabani +1
Mix networks are an important tool to implement anonymous communication, which protects not just the content but also the metadata of messages. Over time, various packet formats fo…
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…