Fast plagiarism detection system

Authors:
Maxim Mozgovoy;Kimmo Fredriksson;Daniel White;Mike Joy;Erkki Sutinen
Affiliations:
Department of Computer Science, University of Joensuu, Joensuu, Finland;Department of Computer Science, University of Joensuu, Joensuu, Finland;Department of Computer Science, University of Warwick, Coventry, U.K.;Department of Computer Science, University of Warwick, Coventry, U.K.;Department of Computer Science, University of Joensuu, Joensuu, Finland
Venue:
SPIRE'05 Proceedings of the 12th international conference on String Processing and Information Retrieval
Year:
2005

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Abstract

The large class sizes typical for an undergraduate programming course mean that it is nearly impossible for a human marker to accurately detect plagiarism, particularly if some attempt has been made to hide the copying. While it would be desirable to be able to detect all possible code transformations we believe that there is a minimum level of acceptable performance for the application of detecting student plagiarism. It would be useful if the detector operated at a level that meant for a piece of work to fool the algorithm would require that the student spent a large amount of time on the assignment and had a good enough understanding to do the work without plagiarising.