Decline in US BitTorrent traffic, says study

The report, from broadband measurement firm Sandvine, shows a sharp decrease in the bandwidth taken up by BitTorrent traffic, some of which is associated with the downloading of illegal music and movies.

Torrent-based peer-to-peer file sharing is on the decrease, partly because people are turning to other ways to swap material.

The use of "dark nets" such as Tor and encrypted digital lockers is growing in popularity.