New patents are issued by the USPTO on Tuesdays. Today's Spotlight Patents concern aspects of digital fingerprinting and digital watermarking. Assigned to Viasat, the first patent addresses techniques for correlative anticipatory deltacasting. Assigned to Nagravision (CH), the second patent addresses techniques for enforcing watermarking instructions in a receiving device.
9,363,308, "Correlative anticipatory deltacasting," assigned to Viasat, Inc.
Methods, apparatuses, and systems for improving utilization of a communications system (e.g., a satellite communications system) are provided through techniques referred to herein as "deltacasting." Some embodiments use a server-side optimizer to intercept and create fingerprints of byte-level content data traversing links of the communications system. The content fingerprints are used to transparently identify communications patterns (e.g., repetitious downloads of the same content, correlations between users, etc.), which may then be used in exploiting multicasting and/or other opportunities for increased utilization of the communication links.
9,363,482, "Method to enforce watermarking instructions in a receiving device," assigned to Nagravision (CH).
A method to enforce watermarking instructions by a security module in a receiving device, comprising the steps of receiving a security message by--a security module, comprising at least a content key, watermark instructions and security message signature, said watermark instruction activates or deactivates a watermarking module, decrypting--a security message with a transmission key, verifying--a security message signature, and in case of successful verification, reading a watermarking data from the watermarking module, verifying the authenticity of the watermarking data, and in case of successful verification, transmitting the watermark instructions to the watermark module and the content key to a descrambling module.