They're out to get you

摘要

An army of automated detectives is getting ready to track down pirated books, pictures and music on the Net. Unlike some existing schemes, they won't need digital "water-marks" to find pirated files. In music files, for example, the marks can change the music. Every year, music, text and image files that are worth an estimated £10 billion to their copyright owners are illegally copied over the Internet, according to analysts in the US. To disguise this digital booty, pirates give files false names or even split and spread them among many different servers.