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Detecting Source-Code Plagiarism

By Bob Zeidman, July 01, 2004

Bob examines the tools and algorithms for uncovering plagiarism in source code.
July, 2004: Detecting Source-Code Plagiarism

(a) 

Word1[0] = "abc"     Word2[0] = "Aabc"
Word1[1] = "abc1"    Word2[1] = "aBc"
Word1[2] = "abc123"  Word2[2] = "abc1111111"
Word1[3] = "abcdef"  Word2[3] = "abcXXXyz"
Word1[4] = "pdq"     Word2[4] = "i"
Word1[5] = "xxx"     Word2[5] = "j"
Word1[6] = "xyz"     Word2[6] = "pdq"
Word1[7] = "yyy"     Word2[7] = "X"

(b) 

PartialWord[0] = "abc"
PartialWord[1] = "abc1"
PartialWord[2] = "xxx"
PartialWord[3] = "xyz"

Figure 2: Partial word matching. (a) Nonkeyword words in files 1 and 2; (b) matching partial words.



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