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Tor: The Second-Generation Onion Router

Tor: The Second-Generation Onion Router,Roger Dingledine,Nick Mathewson,Paul F. Syverson

Tor: The Second-Generation Onion Router   (Citations: 784)
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We present Tor, a circuit-based low-latency anonymous com- munication service. This second-generation Onion Routing system addresses limitations in the original design by adding perfect forward secrecy, congestion control, directory servers, integrity checking, configurable exit policies, and a practi- cal design for location-hidden services via rendezvous points. Tor works on the real-world Internet, requires no special priv- ileges or kernel modifications, requires little synchronization or coordination between nodes, and provides a reasonable tradeoff between anonymity, usability, and efficiency. We briefly describe our experiences with an international network of more than 30 nodes. We close with a list of open problems in anonymous communication.
Conference: USENIX Security Symposium , pp. 303-320, 2004
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