Researchers have devised a way to monitor BitTorrent users over long
stretches of time, a feat that allows them to map the internet
addresses of individuals and track the content they are sending and
In a paper presented earlier this week at the Usenix Workshop on Large-Scale Exploits and Emergent Threats,
the researchers demonstrated how they used the technique to
continuously spy on BitTorrent users for 103 days. They collected 148
million IP addresses and identified 2 billion copies of downloads, many
of them copyrighted.