Riposte: An Anonymous Messaging System Handling Millions of Users
Authors: H. Corrigan-Gibbs, D. Boneh, and D. Mazières
Abstract:
This paper presents Riposte, a new system for anonymous broadcast messaging.
Riposte is the first such system, to our knowledge, that simultaneously
protects against traffic-analysis attacks, prevents anonymous denial-of-service
by malicious clients, and scales to million-user anonymity sets. To achieve
these properties, Riposte makes novel use of techniques used in systems for
private information retrieval and secure multi-party computation.
For latency-tolerant workloads with many more readers than writers
(e.g. Twitter, Wikileaks), we demonstrate that a three-server Riposte cluster
can build an anonymity set of 2,895,216 users in 32 hours.
Reference:
IEEE Symposium on Security and Privacy 2015, pp. 321-338.
Full paper: pdf
Related papers: Slides available here.