Such investigations should also be concentrated to those international prosecutors in Stockholm, Gothenburg, and Malmö, as well as police with similar capabilities in the same locations, the recommendation said.
The National Criminal Investigation Department suggests coordinating reports of crime, as well as assisting other police agencies in investigating. Certain prosecutors would get a 10 day class.
The head of the Pirate Party, a group advocating file sharing in Sweden, said the class period was much too short to learn so much technical information.
Investigators are recommending a five-week-long class as part of police training.
Sweden became the focus of a file-sharing controversy after police shut down the popular Pirate Bay Web site.
Last year the county passed a law banning the sharing of copyrighted material on the Internet without payment of royalties, in a bid to crack down on free downloading of music, films and computer games. Violators can face a two-year prison sentence.