Method and apparatus to make code more difficult to reverse...

Data processing: software development – installation – and managem – Software program development tool – Translation of code

Reexamination Certificate

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C717S140000, C717S151000

Reexamination Certificate

active

10650191

ABSTRACT:
Method and apparatus to make code more difficult to reverse engineer is described. Inert instructions are inserted between instructions within a program. The inert instructions may perform logic operations with the net effect of not changing an argument. Furthermore, the inserted inert instructions may be repositioned within the program to further obfuscate the desired function of the program, making the code more difficult to reverse engineer.

REFERENCES:
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patent: 6694435 (2004-02-01), Kiddy
patent: 6779114 (2004-08-01), Chow et al.
patent: 7054443 (2006-05-01), Jakubowski et al.
patent: 7080257 (2006-07-01), Jakubowski et al.
patent: 2005/0183072 (2005-08-01), Horning et al.
Collberg et al., “A TAxonomy of Obfuscating Transformations”, Technical Report#148, Jul. 1997.
D. Low, “Java Control Flow Obfuscation”, Jun. 3, 1998.
Forrest et al., “Building Diverse Computer Systems”, 1997.
M. Christodorescu et al., “Static Analysis of Executables to Detect Malicious Patterns”, Feb. 18, 2003.
M. Christodorescu et al., “Static Analysis of Binaries for Malicious Code Detection”, Aug. 7, 2003.
“Cloakware/Transcoder.”Cloakware.Dec. 9, 2003. <http://206.191.60.52/products/transcoder.html>.

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