Dr. Giulia Fanti
Electrical and Computer Engineering
Carnegie Mellon University
Bitcoin enjoys a public perception of being a privacypreserving financial system. In reality, Bitcoin has a number of privacy vulnerabilities, including the well-studied fact that transactions can be linked through the public blockchain. More recently, researchers have demonstrated deanonymization attacks that exploit a lower-layer weakness: the Bitcoin peer-to-peer (P2P) networking stack. In particular, the P2P network currently forwards content in a structured way that allows observers to deanonymize users by linking their transactions to the originating IP addresses. In this work, we first demonstrate that current protocols exhibit poor anonymity guarantees, both theoretically and in practice. Then, we consider a first-principles redesign of the P2P network, with the goal of providing strong, provable anonymity guarantees. We propose a simple networking policy called Dandelion, which achieves nearly-optimal anonymity guarantees at minimal cost to the network's utility.
Giulia Fanti is an assistant professor of ECE at Carnegie Mellon University, with a focus on privacy-preserving technologies. She obtained her Ph.D. in EECS from U.C. Berkeley, and her B.S. in ECE from Olin College of Engineering in 2010. She is a recipient of the National Science Foundation Graduate Research Fellowship, as well as a Best Paper Award at ACM Sigmetrics 2015 for her work on anonymous rumor spreading, in collaboration with Peter Kairouz, Prof. Sewoong Oh and Prof. Pramod Viswanath of UIUC.
Refreshments will be served at 4 p.m.
January 14 2019
January 17 2019
12:00 PM - 1:20 PM
Scott Institute for Energy Innovation
Advancing a clean environment and clean energy: Lessons from the trenches and a look ahead
5201 Scott Hall
January 23 2019
12:00 PM - 2:30 PM
Rangos Ballroom, Cohon University Center
January 25 2019
1:00 PM - 2:00 PM
Seminar with Dr. Marco Castaldi
100 Porter Hall
March 8 2019
March 11-15 2019