System and method for watermarking software

A method implemented by a computer for enabling tracking of software, the method comprising:

• receiving marking input code corresponding to a computer program;
• identifying locations of the marking input code that can be modified in ways that preserve functionality of the computer program;
• and
• select at least one code transformation to apply to the marking input code, each of the at least one code transformation having a specific intrinsic constant;
• deriving derived constants from the specific intrinsic constants;
• injecting the at least one code transformation, including the corresponding derived constant, into the marking input code;
• saving the results of the above steps on computer readable media as marked code;
• and
• saving metadata including a list of the derived constants on computer readable media in a file that is separate from the marked code, wherein the metadata can be used to determine if other computer program code was derived from the marked code.

A non-transient computer-readable storage medium having instructions embodied thereon, the instructions being executable by one or more processors to perform a method implemented by a computer for enabling tracking of software, the method comprising:

• receiving marking input code corresponding to a computer program;
• identifying locations of the marking input code that can be modified in ways that preserve functionality of the computer program;
• and
• selecting at least one code transformation to apply to the marking input code, each of the at least one code transformation having a specific intrinsic constant;
• deriving derived constants from the specific intrinsic constants;
• injecting the at least one code transformation, including the corresponding derived constant, into the marking input code;
• saving the results of the above steps on computer readable media as marked code;
• and
• saving metadata including a list of the derived constants on computer readable media in a file that is separate from the marked code, wherein metadata can be used to determine if other computer program code was derived from the marked code.

A system implemented by a computer for detecting a watermark in software, the system comprising:

• one or more hardware processors configured by machine-readable instructions to:
• receive marked code corresponding to at least a portion of a computer program, wherein the marked code is created by;
• identifying locations of the marking input code that can be modified in ways that preserve functionality of the computer program;
• select at least one code transformation to apply to the marking input code, each of the at least one code transformation having a specific intrinsic constant;
• derive derived constants from the specific intrinsic constants;
• inject the at least one code transformation, including the derived constant, into the marking input code and
• scan the marked code to look for specified patterns associated with the watermark data.