Patent ID: 7840489
Filing Date: 2010-11-23
Classification: G06F,G06Q,H04N

Abstract:
1. A method comprising: generating a shared cryptographic key by a transmitting device; and sharing the cryptographic key by a plurality of digital rights management (DRM) systems supplied by different providers, each of the plurality of DRM systems to encrypt the shared cryptographic key, the plurality of DRM systems being included in the transmitting device; encrypting media with the shared cryptographic key by the transmitting device; receiving the encrypted media and the shared cryptographic key from the transmitting device by a first receiving device; decrypting the encrypted media by a first DRM system included in the first receiving device, the first DRM corresponding to one of the plurality of DRM systems included in the transmitting device; re-encrypting the media with the shared cryptographic key; and transmitting the re-encrypted media from the first receiving device.