Systems and methods for watermarking software and other media
First Claim
1. A method for watermarking computer code, the method performed by a computer system comprising a processor and a memory encoded with program instructions that, when executed by the processor, cause the system to perform the method, the method comprising:
- statistically analyzing the computer code to generate one or more statistical models of the computer code;
generating at least one watermark based on the one or more statistical models of the computer code and a plurality of watermark primitives;
inserting the at least one watermark into the computer code; and
wherein statistically analyzing the computer code further comprises;
analyzing the computer code using a Markov model to identify a plurality of common code sequences and idioms; and
generating the statistical model based on the identified plurality of common code sequences and idioms.
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Accused Products
Abstract
Systems and methods are disclosed for embedding information in software and/or other electronic content such that the information is difficult for an unauthorized party to detect, remove, insert, forge, and/or corrupt. The embedded information can be used to protect electronic content by identifying the content'"'"'s source, thus enabling unauthorized copies or derivatives to be reliably traced, and thus facilitating effective legal recourse by the content owner. Systems and methods are also disclosed for protecting, detecting, removing, and decoding information embedded in electronic content, and for using the embedded information to protect software or other media from unauthorized analysis, attack, and/or modification.
98 Citations
11 Claims
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1. A method for watermarking computer code, the method performed by a computer system comprising a processor and a memory encoded with program instructions that, when executed by the processor, cause the system to perform the method, the method comprising:
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statistically analyzing the computer code to generate one or more statistical models of the computer code; generating at least one watermark based on the one or more statistical models of the computer code and a plurality of watermark primitives; inserting the at least one watermark into the computer code; and wherein statistically analyzing the computer code further comprises; analyzing the computer code using a Markov model to identify a plurality of common code sequences and idioms; and generating the statistical model based on the identified plurality of common code sequences and idioms. - View Dependent Claims (2, 3, 4, 5)
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6. A method for watermarking a first computer code, the method performed by a computer system comprising a processor and a memory encoded with program instructions that, when executed by the processor, cause the system to perform the method, the method comprising:
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statistically analyzing a second computer code to generate one or more statistical models of the second computer code; generating at least one watermark based on the one or more statistical models of the second computer code and a plurality of watermark primitives; inserting the at least one watermark into the first computer code; and wherein statistically analyzing the second computer code further comprises; analyzing the second computer code using a Markov model to identify a plurality of common code sequences and idioms; and generating the statistical model based on the identified plurality of common code sequences and idioms. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification