Addra - Metadata-Private Voice Communication Over Fully Untrusted Infrastructure

Explore a conference talk on Addra, a groundbreaking system for metadata-private voice communication over untrusted infrastructure. Delve into the innovative design that allows for scalable, secure voice calls without relying on trusted intermediaries. Learn about the novel approach to mailbox assignment and the development of FastPIR, a new private information retrieval scheme that significantly improves message latency. Discover how Addra achieves a 7x performance improvement over previous systems, serving 32,000 users with impressive message latency. Gain insights into the challenges of metadata privacy, the architecture of the system, and its advantages in scaling and performance compared to existing solutions.

Introduction
Metadata
Challenges
Private Information Retrieval
Architecture
Advantages
Scaling
Performance comparison
Summary