Application Scenarios Software plagiarism detection [1 Traditional plagiarism detection tools may not be applicable for serious software plagiarism problems A new tool based on graph pattern matching Represent the source codes as program dependence graphs 2 se graph pattern matching to detect plagiarism int sum(int array [], int court) ant 1, sun; 2: declaration. int sum o for (i= O; i< count: 1++)[ sum= add(sum, array[i])i 6: assignment, i=0(0: declaration, int count retm int add(int ant 5: control i< count 1: declaration. retum a+ b: 8. increment i++ 7: assignment, sum=0 9: assignment, sum=addo 3: declaration. int array 4: retum retum sum 10: call-site. add( sum. armaylilApplication Scenarios 3 • Traditional plagiarism detection tools may not be applicable for serious software plagiarism problems. • A new tool based on graph pattern matching – Represent the source codes as program dependence graphs [2] . – Use graph pattern matching to detect plagiarism. Software plagiarism detection [1]