Thursdays the PTO publishes new pending patent applications. Both of Thursay's Spotlight Applications concern aspects of watermarking. Assigned to Nagravision (CH), the first application discloses techniques to enforce watermarking instructions in a receiving device. Assigned to Sony (JP), the second application discloses techniques for embedding an electronic watermark in a data area.
20140177834, "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.
20140177904, "Recording medium and producing method thereof, reproducing method and reproducing apparatus, and copyright managing method," assigned to Sony (JP).
A GUID as title information and a global serial number are recorded in a BCA of a digital video disc. A hash value of the GUID is embedded as an electronic watermark in a data area. When content data is reproduced from the digital video disc, a match of information of the two GUIDs is checked so as to prevent the digital video disc from being illegally copied. A lead-in area and a managing organization provide disc revocation lists. With a global serial number and a disc revocation list, content data can be prevented from being reproduced from an illegally distributed disc. A film WM detector detects data embedded in a movie shown in a theater so as to prevent content data from being reproduced from a disc on which the embedded data is recorded. Thus, content data can be prevented from being reproduced from an illegally distributed disc before a copyright supervisor of the content authorizes the disc to be distributed.