We present a detailed description of an algorithm tailored to detect external plagiarism in PAN-09 competition. The algorithm is divided into three steps: a first reduction of the size of the problem by a selection of ten suspicious plagiarists using a n-gram distance on properly recoded texts. A search for matches after T9-like recoding. A “joining algorithm” that merges selected matches and is able to detect obfuscated plagiarism. The results are briefly discussed. Keywords: n-grams, plagiarism, coding, string matching

A plagiarism detection procedure in three steps: selection, matches and ”squares”

CRISTADORO, GIAMPAOLO;DEGLI ESPOSTI, MIRKO
2009

Abstract

We present a detailed description of an algorithm tailored to detect external plagiarism in PAN-09 competition. The algorithm is divided into three steps: a first reduction of the size of the problem by a selection of ten suspicious plagiarists using a n-gram distance on properly recoded texts. A search for matches after T9-like recoding. A “joining algorithm” that merges selected matches and is able to detect obfuscated plagiarism. The results are briefly discussed. Keywords: n-grams, plagiarism, coding, string matching
2009
Proceedings of the SEPLN'09 Workshop on Uncovering Plagiarism, Authorship and Social Software Misuse
19
24
C. Basile; D. Benedetto; E. Caglioti; G. Cristadoro; M. Degli Esposti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/80937
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