Abstract
악의적인 소프트웨어 역공학으로부터 프로그램이 가지는 코드를 보호하기 위해서 코드 난독화가 제안되었다. 이것은 기존에 존재하는 프로그램 코드를 어렵게 변환시키는 것으로 프로그램 코드에 대한 악의적인 정적 분석을 어렵게 만든다. 코드 난독화는 난독화 목적에 따라 레이아웃, 데이터, 제어 난독화로 분류되어진다. 이 중 제어 난독화는 프로그램이 가지는 제어 흐름에 대한 추상적인 정보를 보호하는 것으로 다양한 종류의 개별 제어 흐름 난독화 변환이 제안되었지만, 이를 효과적으로 적용할 수 있는 방법은 제안되지 않았다. 본 논문에서는 제어 흐름 난독화 변환을 프로그램에 효과적으로 적용할 수 있는 난독화 전략을 제안하고, 실험을 통해서 제안한 난독화 전략의 효용을 보였다. Code obfuscation has been proposed to protect codes in a program from malicious software reverse engineering. It converts a program into an equivalent one that is more difficult to understand the program. Code obfuscation has been classified into various obfuscation technique such as layout, data, control, by obfuscating goals. In those obfuscation techniques, control obfuscation is intended to complicate the control flow in a program to protect abstract information of control flow. For protecting control flow in a program, various control obfuscation transformation techniques have been proposed. However, strategies for effectively applying a control flow obfuscation to program have not been proposed yet. In this paper, we proposed a obfuscation strategy that effectively applies a control flow obfuscation transformation to a program. We conducted experiment to show that the proposed obfuscation strategy is useful for applying a control flow transformation to a program.
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More From: Journal of the Korea Society of Computer and Information
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