Peter Biddle Paul England Marcus Peinado Bryan Willman The Darknet and the Future of Content Protection. 344-365 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2770&spage=344 2003 conf/drm/2003 Digital Rights Management db/conf/drm/drm2003.html#BiddleEPW03