Authentication and authorization of a device by a service using broadcast encryption

Abstract

Provided are techniques to enable a device that provides a service to authorize a second device for receiving the service and the delivery of the service to the second device and other devices within a trusted network. A signed Management Key Block (MKB) is generated and transmitted over a network. Devices authorized to access a particular service parse the MKB and transmit a request. A server associated with the service determines whether or not the device is authorized to access the service based upon data included in the request. The first device may issue a challenge to the second device for authentication purposes. If service is approved, service is initiated, either from the first device or another authorized device. Devices may be organized into classes such that devices of a specific class are authorized to access the service.