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논문 기본 정보

자료유형
학술저널
저자정보
Jeong-Hoon Ji (부산대학교) Su-Hyun Park (부산대학교) Gyun Woo (부산대학교) Hwan-Gue Cho (부산대학교)
저널정보
대한전기학회 International Journal of Control Automation and Systems International Journal of Control Automation and System Vol.6 No.6
발행연도
2008.12
수록면
809 - 817 (9page)

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Program plagiarism is widespread due to intelligent software and the global Internet environment. Consequently the detection of plagiarized source code and software is becoming important especially in academic field. Though numerous studies have been reported for detecting plagiarized pairs of codes, we cannot find any profound work on understanding the underlying mechanisms of plagiarism. In this paper, we study the evolutionary process of source codes regarding that the plagiarism procedure can be considered as evolutionary steps of source codes. The final goal of our paper is to reconstruct a tree depicting the evolution process in the source code. To this end, we extend the well-known bioinformatics approach, a local alignment approach, to detect a region of similar code with an adaptive scoring matrix. The asymmetric code similarity based on the local alignment can be considered as one of the main contribution of this paper. The phylogenetic tree or evolution tree of source codes can be reconstructed using this asymmetric measure. To show the effectiveness and efficiency of the phylogeny construction algorithm, we conducted experiments with more than 100 real source codes which were obtained from East-Asia ICPC (International Collegiate Programming Contest). Our experiments showed that the proposed algorithm is quite successful in reconstructing the evolutionary direction, which enables us to identify plagiarized codes more accurately and reliably. Also, the phylogeny construction algorithm is successfully implemented on top of the plagiarism detection system of an automatic program evaluation system.

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Abstract
1. INTRODUCTION
2. MAIN PROBLEMS
3. ASYMMETRIC SIMILARITY MEASURE FOR CODE PLAGIARISM
4. INFERRING ALGORITHM FOR PHYLOGENETIC TREE
5. EXPERIMENTS
6. APPLICATION: AUTOMATED EVALUATING SYSTEM FOR PROGRAMMING ASSIGNMENT WITH ANTI-PLAGIARISM FEATURES
7. CONCLUSION
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