System and method for obfuscation of reverse compiled...

Details System and method for obfuscation of reverse compiled... System and method for obfuscation of reverse compiled...

2011-05-03

2011-05-03

Chavis, John (Department: 2193)

Data processing: software development, installation, and managem

Software program development tool

Translation of code

Reexamination Certificate

active

07937693

ABSTRACT:
A method, system and computer program product for obfuscating pseudocode (e.g., p-code, IL-code, byte-code, etc.), including creating a class-container; declaring an anonymizer method in the class-container; identifying method call instructions in the pseudocode; replacing, in the pseudocode, method calls with calls of the anonymizer method; and in the anonymizer method, adding the method call instructions. All or some of the added method calls have the same name. Parameter types of the added calls can be replaced with an abstract type. Return types of the added calls can be replaced with an abstract type. The class-container is a global class, and includes calls to public method, or the class-container is a private nested class, and includes calls to private methods, or two separate class-containers can be used. Optionally, the invention can include identifying field load instructions in the pseudocode; replacing, in the pseudocode, field load instructions with calls of the anonymizer method; and in the anonymizer method, adding the field load instructions.

REFERENCES:
patent: 5613099 (1997-03-01), Erickson et al.
patent: 7150003 (2006-12-01), Naumovich et al.
patent: 2002/0034193 (2002-03-01), Patki et al.
patent: 2003/0221121 (2003-11-01), Chow et al.
patent: 2005/0044359 (2005-02-01), Eriksson et al.

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