System and method for securing the life-cycle of user domain rights objects
View Patent ↗In a method for enabling support for backwards compatibility in a User Domain, in one of a Rights Issuer (RI) and a Local Rights Manager (LRM), a Rights Object Encryption Key (REK) and encrypted REK are received from an entity that generated a User Domain Authorization for the one of the RI and the LRM and the REK is used to generate a User Domain Rights Object (RO) that includes the User Domain Authorization and the encrypted REK.
1. A method for targeting a user domain rights object (RO) to a secure content exchange (SCE)-conformant digital rights management (DRM) agent, comprising:
in one of a rights issuer (RI) device or a local rights manager (LRM) device,
validating that the SCE-conformant DRM Agent is in a user domain by receiving an attribute certificate from a domain enforcement agent (DEA), wherein the attribute certificate contains information proving that the SCE-conformant DRM agent is in the user domain wherein the attribute certificate identifies the user domain and the one of the RI device or the LRM device, and wherein the one of the RI device or the LRM device is not granted access to a user domain key and the information does not include the user domain key to facilitate maintaining security with regard to the user domain key; and
targeting the user domain RO to the SCE-conformant DRM agent by generating a targeted user domain RO for initial use solely by the SCE-conformant DRM Agent.
2. The method of claim 1 , wherein the generating the targeted user domain RO further comprises generating the targeted user domain RO in the one of the RI device or the LRM device without knowledge of the user domain key.
3. The method of claim 1 , wherein the validating the SCE-conformant DRM agent is facilitated by receiving the attribute certificate from at least one of the SCE-conformant DRM agent or the DEA.
4. The method of claim 1 , wherein the generating the targeted user domain RO to the SCE-conformant DRM Agent further comprises generating the targeted user domain RO without use of the user domain key.
5. The method of claim 1 , wherein the attribute certificate comprises a user domain authorization.
6. The method of claim 5 , wherein the generating the targeted user domain RO is facilitated by including the user domain authorization as part of the user domain RO.
7. The method of claim 1 , wherein the generating the targeted user domain RO is facilitated using a public key of the SCE-conformant DRM agent contained in or derived from an identity certificate received from the source SCE-conformant DRM agent.
8. The method of claim 7 , wherein the validating the SCE-conformant DRM agent further comprises verifying that the identity certificate includes at least an SCE DRM agent key purpose to validate the SCE-conformant DRM agent.
9. The method of claim 1 , wherein the targeting the user domain RO to the SCE-conformant DRM agent further comprises providing, by the RI device, the LRM device, or the DEA, the attribute certificate identifying the RI device or the LRM device to the SCE-conformant DRM agent.
10. The method of claim 1 , further comprising:
in connection with the user domain RO, converting DRM information from a first DRM format to a second DRM format that is supported by a communication device to which the DRM information is being transferred.
11. The method of claim 1 , wherein the generating the targeted user domain RO is facilitated using a defined device RO construction with an overlay of user domain authorizations.