New pending patent applications are published by the PTO on Thursdays. Both of today's Spotlight Applications concern aspects of digital watermarking and both are assigned to Intertrust Technologies. The first application discloses ways of encoding and protecting data using digital signature and watermarking techniques. The second application discloses software self-checking systems and methods.
20150067882, "Methods and systems for encoding and protecting data using digital signature and watermarking techniques," assigned to Intertrust Technologies.
Systems and methods are provided for determining a presence of a watermark in electronic data. In certain embodiments, a plurality of keys is generated, and a plurality of payloads are retrieved from electronic data using the keys. A statistical indicia of randomness is generated based on the payloads, and the presence of a watermark is determined when the indicia is below a threshold.
20150067837, "Software self-checking systems and methods," assigned to Intertrust Technologies.
Software self-checking mechanisms are described for improving software tamper resistance and/or reliability. Redundant tests are performed to detect modifications to a program while it is running. Modifications are recorded or reported. Embodiments of the software self-checking mechanisms can be implemented such that they are relatively stealthy and robust, and so that it they are compatible with copy-specific static watermarking and other tamper-resistance techniques.