An anonymous reader writes: A new report published by the European Union Intellectual Property Office identifies a wide range of 'business models' that are used by pirate sites. The organization, which announced a new collaboration with Europol this week, signals Bitcoin and the Tor network as two key threats to ongoing anti-piracy efforts. According to the research, several infringing business models rely on encryption-based technologies. The Tor network and Bitcoin, for example, are repeatedly mentioned as part of this "shadow landscape." "It more and more relies on new encrypted technologies like the TOR browser and the Bitcoin virtual currency, which are employed by infringers of IPR to generate income and hide the proceeds of crime from the authorities," the report reads.