To render digital content encrypted according to a content key (KD) on a first device having a public key (PU1) and a corresponding private key (PR1), a digital license corresponding to the content is obtained, where the digital license includes the content key (KD) therein in an encrypted form. The...http://www.google.fr/patents/US7624451?utm_source=gb-gplus-shareBrevet US7624451 - Binding a digital license to a portable or the like in a digital rights management (DMR) system and checking out/checking in the digital license to/from the portable device or the like
Binding a digital license to a portable or the like in a digital rights ...
