Patent
Obfuscating computer program code
Johan Eker,Björn Johansson,Carl Von Platen +2 more
- 20 Nov 2007
231
TL;DR: In this paper, a computer-implemented method of tamper-protecting computer program code is presented, which includes: obtaining an input representation of the program code; identifying a conditional program statement for causing a data processing system to selectively execute one of at least a first and a second sets of program statements when said computer program is executed by a Data Processing System; replacing the identified conditional program statements with a set of transformed program statements to obtain obfuscated program code.
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Abstract: A computer-implemented method of tamper-protecting computer program code. The method comprises: obtaining an input representation of the computer program code; identifying a conditional program statement for causing a data processing system to selectively execute one of at least a first and a second sets of program statements when said computer program is executed by a data processing system; replacing said identified conditional program statement and the first and second sets of program statements with a set of transformed program statements to obtain obfuscated program code, wherein the set of transformed program statements is adapted to cause the data processing system to execute at least a part of each of the transformed program statements when said computer program is executed by the data processing system.
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Citations
Patent
Systems and methods of source software code obfuscation
Paul Marion Hriljac
- 01 Feb 2011
TL;DR: In this article, a data transformation is applied to one or more value representations in the computer-executable instructions to create code segments, the data transformation comprising at least one of a nonlinear transformation and a function composition transformation.
12
Patent
Framework for efficient security coverage of mobile software applications that is usable to harden in the field code
Osman Abdoul Ismael,Dawn Song,Ashar Aziz,Noah M. Johnson,Adrian Matthew Mettler +4 more
- 23 Feb 2013
TL;DR: In this paper, the authors describe a method that includes receiving an application and creating a representation of the application that describes states and state transitions, and then using the description and the representation to determine actions to be added to the application and locations within the application where the actions are to be performed.
12
Patent
Securing accessible systems using base function encoding
Harold Johnson,Yuan Xiang Gu,Michael Wiener,Yongxin Zhou +3 more
- 28 Mar 2013
TL;DR: In this paper, the authors present a system and techniques for securing accessible computer-executable program code and systems, where one or more base functions may be generated and blended with existing program code, such that it may be difficult or impossible for a potential attacker to distinguish the base functions from the existing code.
12
Patent
System and method for conditional expansion obfuscation
Gideon M. Myles,Tanya Michelle Lattner,Julien Lerouge,Augustin J. Farrugia +3 more
- 02 Sep 2008
TL;DR: In this paper, the authors present a method for obfuscating code through conditional expansion obfuscation, which includes identifying a conditional expression in a computer program, identifying a sequence of conditional expressions that is semantically equivalent to the conditional expression, and replacing the conditional expressions with the semantically-equivalent sequence of expressions.
12
Patent
Framework for efficient security coverage of mobile software applications
Osman Abdoul Ismael,Dawn Song,Ashar Aziz,Noah M. Johnson,Prashanth Mohan,Hui Xue +5 more
- 23 Feb 2013
TL;DR: In this paper, the authors describe a method to generate a representation of an application that describes specific states of the application and specific state transitions of the program, and identify a region of interest based on rules and observations of application's execution.
11
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