A trusted system is a hardware device, such as a computer or home entertainment center, that is equipped with digital rights management (DRM) software. DRM software controls the uses that can be made of copyrighted material in the secondary (after sale) market, in violation of established U.S. Principles of copyright law; however, copyright law restrictions are evaded by software licenses denying that a sale has taken place.
Software for such systems specify transport rights (permission to copy the media, loan it to another user, or transfer the license to another user), rendering rights (permission to view or listen to the content), and derivative-work rights (permission to extract and reuse content from the protected work). See copyright, Digital Millennium Copyright Act (DMCA), digital rights management (DRM), first sale.