Kazaa will have to modify its software to filter out key words linked to copyrighted material by December 5 or be shut down, music industry officials have said of the ruling.
The court extended until late February a stay of an injunction barring it from distributing copyrighted recordings, Kazaa operator Sharman Networks said. Peer-to-peer networks let users share files rather than relying on a centralized server.
In recent years, such networks have been a hotbed of pirated entertainment and software.
