Pirates: Anonymous Group Calls Over Fully Untrusted Infrastructure

arXiv:2404.09095v1 Announce Type: new
Abstract: Anonymous metadata-private voice call protocols suffer from high delays and so far cannot provide group call functionality. Anonymization inherently yields delay penalties, and scaling signalling and communication to groups of users exacerbates this situation. Our protocol Pirates employs PIR, improves parallelization and signalling, and is the first group voice call protocol that guarantees the strong anonymity notion of communication unobservability. Implementing and measuring a prototype, we show that Pirates with a single server can support …

anonymization anonymous arxiv call communication cs.cr far high infrastructure metadata penalties pirates private protocol protocols scaling untrusted voice