Kazaa files lawsuit against music, movie companies

Makers of the most popular online file-sharing network are suing entertainment companies for copyright infringement, alleging the companies used unauthorized versions of its software to snoop on users in their efforts to battle piracy. "Sharman Networks, the company behind the Kazaa file-sharing software, filed a federal lawsuit Monday, accusing the movie studios and the Recording Industry of America of using "Kazaa Lite," a replica of its software without advertising, to get onto the network. Sharman claims its copyright was violated because Kazaa Lite is an unauthorized version of its free software."

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