Patent ID: 7570768
Filing Date: 2009-08-04
Classification: G06F

Abstract:
1. A method for rendering content encrypted according to a cryptographic key, the content having corresponding rights data including a decryption key (KD) for decrypting the encrypted content, (KD) in the rights data being encrypted according to a public key of a rights management (RM) server (PU-RM) to result in (PU-RM(KD)), whereby only the RM server having a private key (PR-RM) corresponding to (PU-RM) can apply same to (PU-RM(KD)) from the rights data to obtain (KD), and whereby the RM server normally delivers (KD) within a license that is bound to the content, and whereby the RM server upon being decommissioned can no longer issue any such license, the method comprising: receiving a notification that the RM server has been decommissioned; attempting to render a piece of content; determining that such content is protected to the decommissioned RM server; sending a request to the decommissioned RM server for the content key (KD) for the content rather than any license; and receiving (KD) from the decommissioned RM server.