While I admittedly don't know too much about Tor, I've recently been reviewing Tarzan[0] which seems like a good candidate for anonymous proxying. If Wikipedia

While I admittedly don't know too much about Tor, I've recently been reviewing Tarzan[0] which seems like a good candidate for anonymous proxying. If Wikipedia is to be believed Tor mainly uses Onion Routing with a set of servers as the core of the system.[1] The Tarzan paper mentions why this might be problematic and suggests instead a decentralized P2P system, using a mix network with (what you might call) onion routing and cover traffic. The authors claim this eliminates the "single point of failure" and the effectiveness of even network-wide analysis. And since Tarzan should be ideal as a drop-in middle-layer, I'd think this would fit an application like BitTorrent. Unfortunately we never got to use Tarzan in our project, so I of course only have the paper to go by. [0] ftp://163.25.117.117/gyliao/iSmart/1-P2P/2-Anonymity%2BIdentity%20Management/Tarzan-A%20Peer-to-Peer%20Anonymizing%20Network%20Layer.pdf [1] http://en.wikipedia.org/wiki/Tor_(anonymity_network) http://en.wikipedia.org/wiki/Tor_(anonymity_network)