anti-circumvention bill clinton canada cato institute consumer broadband and digital television promotion act copy protection copyright copyright term extension act copyright infringement cryptanalysis cryptography dadvsi def con digital transition content security act digital rights management dmitry sklyarov dongle e-book edward felten electronic frontier foundation european union firmware france howard coble inducing infringement of copyrights act internet jessica litman law librarian of congress macrovision net act niels ferguson north carolina online copyright infringement liability limitation act pirate act portable document format princeton university rick boucher safe harbor sony statutory license subpoena sui generis united states united states code united states house of representatives united states senate wipo copyright and performances and phonograms treaties implementation act wikisource world intellectual property organization