Peter Biddle Paul England Marcus Peinado Bryan Willman The Darknet and the Future of Content Protection. 155-176 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2696&spage=155 2002 conf/ccs/2002drm Digital Rights Management Workshop db/conf/ccs/ccsdrm2002.html#BiddleEPW02