However, there is a problem. Copyrouter works with applications such as those on the Gnutella network like LimeWire, and also works with DCC+, Soulseek and KaZaA (if anyone uses it anymore) but simply cannot do anything about BitTorrent transfers. BitTorrent uses ’swarming’ technology, whereby small pieces of a file are sent out and received, to and from multiple users. This method of shifting data makes it impossible for Copyrouter to examine and compare the fingerprint of files being transferred as we have
argued before, which means that the entire BitTorrent ‘revenue stream’ is off-limits to Brilliant Digital, a real problem since BitTorrent is the Internet’s
most popular P2P protocol.