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Proceedings of the 22nd Australasian Computing Education Conference (ACE)

作者： Cheers, Hayden Lin, Yuqing Smith, Shamus P. Univ Newcastle Callaghan NSW Australia

ISBN: (纸本)9781450376860

source code plagiarism is a persistent problem in undergraduate computer science education. Unfortunately, it is a widespread phenomena with many students plagiarising either because they are unwilling or incapable of completing their own work. Many source code plagiarism detection tools have been proposed to identify suspected cases of source code plagiarism. However, these tools are not resilient to pervasive plagiarism-hiding transformations that significantly change the structure of source code. In this paper, two case studies are presented that explore how resilient current source code plagiarism detection tools are to plagiarism-hiding transformations. Furthermore, an evaluation of a new advanced technique for source code plagiarism detection is presented to show that is it possible to identify pervasive cases of source code plagiarism. The results of this evaluation indicate the technique is robust in its ability to identify the same program after it has been transformed.

关键词： source code plagiarism detection source code obfuscation Program similarity

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SCORE: source code Optimization & REconstruction

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IEEE ACCESS 2020年 8卷 129478-129496页

作者： Suk, Jae Hyuk Lee, Young Bi Lee, Dong Hoon Korea Univ Grad Sch Informat Secur Seoul 02841 South Korea

The main goal of obfuscation is to make software difficult to analyze. Although obfuscation is one useful method to protect programs, the ability to analyze malware is greatly reduced if used for malicious purposes. The obfuscation technique is most applicable at the binary level, but it can also be applied at the source code level. Although source-level techniques can be applied regardless of the target platform, these are often optimized and eliminated during compilation. However, when control-flow obfuscation is applied at the source code level, removal is not possible. When applied for malicious purposes, the ability to analyze the source code and compiled binary code is greatly reduced. To date, no research has presented a method that increases the readability of source code or the ability to analyze compiled binaries via optimization at the source level. In this paper, we select a very powerful obfuscation tool that provides options, including control-flow obfuscation, at the source level. The result of our research is a tool that outputs optimized source code and performs control-flow reconstruction as preprocessing, which increases readability even when control-flow obfuscation has been applied. The results also suggest an improvement in the ability to analyze binary code. As a result, more than 70% of the source code can be optimized at the source level, and the control-flow graph can be serialized. The optimized source code compiles more concise binary code even if no compiler optimizations are applied. Finally, the paper concludes by presenting the results of a module that prevents deobfuscation through code tampering (preventive obfuscation) at the source code level.

关键词： Control-flow obfuscation control-flow reconstruction source code obfuscation source code optimization source code anti-tampering

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