A method for extracting program fingerprints from Java class files

摘要

To support efficient detection of illegal theft for Java class files. This paper presents a new method to derive "program fingerprints" from given Java class files. For a given class file, the proposed method extracts unique property from the class file based on initial value assignments, the sequence of method calls and the inheritance structure. By using the fingerprints, any Java class file can be easily distinguished from other class files. We evalute the proposed method by applying it to J2SDK SE 1.4.1-02. The experimental result shows that the proposed fingerprints can identify 99.94% of all the class files involved.