Thursdays the PTO publishes new pending patent applications. Both of today's Spotlight Applications concern aspects of digital rights management. Assigned ti Irdeto (NL), the first application discloses techniques in a conditional access system for securely obtaining a control word in a chip set of a receiver, the control word used for descrambling scrambled content received by the receiver. Assigned to Cox Communications, the second application discloses techniques for managing rights to broadband content.
20130251146, "Control word protection," assigned to Irdeto B.V. (NL)
A method for securely obtaining a control word in a chip set of a receiver, said control word for descrambling scrambled content received by the receiver, the method comprising, at the chip set: receiving a secured version of a virtual control word from a conditional access/digital rights management client communicably connected to the chip set; obtaining the virtual control word from the secured version of the virtual control word; and using a first cryptographic function to produce a given output from an input that comprises the virtual control word and either a plurality of signature verification keys or one or more values derived from a plurality of signature verification keys, each signature verification key being associated with a conditional access/digital rights management system, the given output comprising at least one control word, wherein the first cryptographic function has the property that it is infeasible to determine a key pair including a signature key and a signature verification key and an input for the first cryptographic function comprising the determined signature verification key or one or more values derived, at least in part, from the determined signature verification key, such that the first cryptographic function produces the given output from the determined input.
20130247225, "Systems and methods for managing rights to broadband content," assigned to Cox Communications.
Systems and methods for managing rights to broadband content are provided. A request for broadband content may be received by a server. The received request may include a client identifier associated with a customer device from which the request is received and a content identifier associated with the requested broadband content. Based at least in part upon the client identifier, a billing account associated with the customer device may be identified, and one or more users associated with the billing account may be identified. A set of access rights for the one or more users may be determined and, based upon an analysis of the set of access rights, a determination may be made as to whether access to the broadband content is authorized.