In an aim to reduce the number of pirated films shared on the BitTorrent network, the man behind the website, Bram Cohen, has signed a deal with the movie industry. will have to remove any links to pirated films, and Mr Cohen must stop people being able to find pirated films when they search via the website.

What is not known is how many of the 45 million users of BitTorrent search for files to download via the site. Many other websites let people search for so-called "torrents" or simply list the most popular ones for people to download and these sites could be unaffected by the deal.

The deal between the Motion Picture Association of America (MPAA) and BitTorrent is the latest in a long line of moves to limit the illegal sharing of films via the net.