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| Content Provider | ACM Digital Library |
|---|---|
| Author | Caldwell, William Choffnes, David Druschel, Peter Merritt, Nicholas Le Blond, Stevens |
| Abstract | Effectively anonymizing Voice-over-IP (VoIP) calls requires a scalable anonymity network that is resilient to traffic analysis and has sufficiently low delay for high-quality voice calls. The popular Tor anonymity network, for instance, is not designed for the former and cannot typically achieve the latter. In this paper, we present the design, implementation, and experimental evaluation of Herd, an anonymity network where a set of dedicated, fully interconnected cloud-based proxies yield suitably low-delay circuits, while untrusted superpeers add scalability. Herd provides caller/callee anonymity among the clients within a trust zone (e.g., jurisdiction) and under a strong adversarial model. Simulations based on a trace of 370 million mobile phone calls among 10.8 million users indicate that Herd achieves anonymity among millions of clients with low bandwidth requirements, and that superpeers decrease the bandwidth and CPU requirements of the trusted infrastructure by an order of magnitude. Finally, experiments using a prototype deployment on Amazon EC2 show that Herd has a delay low enough for high-quality calls in most cases. |
| Ending Page | 652 |
| Page Count | 14 |
| Starting Page | 639 |
| File Format | WebM PDF WAV |
| ISSN | 01464833 |
| DOI | 10.1145/2829988.2787491 |
| Journal | ACM SIGCOMM Computer Communication Review (CCRV) |
| Issue Number | 4 |
| Volume Number | 45 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1993-07-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Strong anonymity Voice-over-ip Intersection attacks Anonymity networks |
| Content Type | Audio Text |
| Resource Type | Article |
| Subject | Computer Networks and Communications Software |
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