PrivacyGroup Event:2017/11/30 Talk on a privacy system
- When and where: 30 November 2017, at 11:00 AM in Gould-Simpson 906.
- Speaker: Sebastian Angel, Ph.D. Candidate (UT Austin)
- Sebastian Angel is a Ph.D. candidate at The University of Texas at Austin and visiting academic at New York University's Courant Institute of Mathematical Sciences. He is interested in topics at the intersection of security, systems, and networking. Beyond private communication, his work includes adding verifiability to large scale auction systems, architecting OS defenses against malicious peripheral devices (USB flash drives, keyboards, etc.), and ensuring that applications running on public data centers achieve predictable performance.
- Title: Privacy in a World of Mass Surveillance
- In this talk I will discuss Pung, a private communication system that allows users to exchange messages over the Internet without revealing any information to network providers (ISPs, E-mail servers, etc.). In particular, providers do not learn with whom users communicate, how often, or the content of any communication. We show that this strong privacy property is achievable even when providers are arbitrarily malicious. To make Pung efficient in practice, we build a new private information retrieval (PIR) library called SealPIR. This library allows a user to retrieve an element from an untrusted server without revealing to the server which element was retrieved. SealPIR is orders of magnitude more network efficient than existing PIR constructions, is concretely efficient, and can be used in other applications.