The application relies on the BitTorrent network to exchange data. A BitTorrent network, then Connect you with several “peers” who offer the data you want to have: you get pieces of your data from every peer down (and it is your BitTorrent client that those pieces again sticking together) <. p> Each peer on the BitTorrent network to the IP address seen by those who connect with him.
To ensure anonymity, Tribler ensures that you no longer directly connects to the BitTorrent peers. Instead Connect you with an intermediate node that acts as a “proxy” for the communication between you and your BitTorrent peer. You BitTorrent peer sees no longer your IP address, but the IP address of the proxy.
If you are only using one proxy communicates with your BitTorrent peer, then that proxy still figure out what data you with whom exchanges.
With the slider in Tribler you indicate how many proxies must be between you and the BitTorrent peer. This makes it much harder to figure out what data you exactly exchanges: the BitTorrent peer sees only one (or more) proxies and proxy can not know whether you’ve sent the original request or that you yourself as a proxy acting for someone else <. / p>
Encryption is also applied to the exchanged data. Your Tribler client connects with multiple proxies (first layer) and communicate with each proxy a public encryption key with which the proxy must encrypt the data to you (your Tribler client then uses the corresponding private key to decrypt the data). Each of these proxies connects subsequently with another proxy (if you Tribler slider 2 or higher) and varies with each of those proxies again (other) public key. In this way, a proxy can not decrypt your data.
… at least that’s what I’ve understood it. The technique is similar to the Tor anonymizing network (“onion routing”).
As far as performance is IMHO still not great. With one proxy layer I took roughly 300 KB / s for torrents with many seeders where I got about 1.5 MB / s with BitTorrent. With 2 layer I took the 100 KB / s anymore. The performance of the whole network is highly dependent on the available proxies. As Tribler is popular, the performance should hit up.
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