Abstract: A method and system for detecting plagiarism of software source code is disclosed. In one embodiment, a database exists of program elements that have previously been found to be matching within the source code for two different programs. This embodiment searches the Internet for occurrences of these matching program elements to determine how many times they appear and thus whether they are commonly used or not. The elements and their associated number of hits are placed in a spreadsheet for further observation and manipulation. One of skill in the art will see that this invention also applies to other kinds of text documents.

Abstract: Plagiarism is detected by comparing statements within source code of a first program to comments within source code of a second program.

Abstract: A software tool allows a user to filter out the results produced by a software source code correlation program that is executed on sets of software source code files. The tool allows the user to discard elements of source code that are not relevant to the analysis without requiring the user to run the correlation program multiple times.

Abstract: A method and system for detecting plagiarism of software source code. In one embodiment, a first set of arrays and a second set of arrays are created for a first program source code file and a second program source code file respectively. Each pair of arrays in the first and second sets has entries corresponding to program elements of a distinct program element type such as functional program code, program comments, or program code identifiers. Next, each pair of arrays from the first and second sets is compared to find similar entries, and an intermediate match score is calculated for each pair of arrays based on the similar entries. Further, the resulting intermediate match scores are combined to produce a combined match score, which is then used to provide an indication of copying with respect to the first program source code file and the second program source code file.

Abstract: Methods and systems for detecting copied program code are described. The detection may be performed by comparing source code of a first program to object code of a second program. Alternatively, the detection may be performed by comparing object code of a first program to object code of a second program.

Abstract: Plagiarism of software source code is a serious problem in two distinct areas of endeavor—cheating by students at schools and intellectual property theft at corporations. A number of algorithms have been implemented to check source code files for plagiarism, each with their strengths and weaknesses. This invention detects plagiarism by comparing statements within source code of a first program to comments within source code of a second program.

Abstract: Plagiarism of software source code is a serious problem in two distinct areas of endeavor—cheating by students at schools and intellectual property theft at corporations. A number of algorithms have been implemented to check source code files for plagiarism, each with their strengths and weaknesses. This invention consists of a combination of algorithms in a single software program to assist a human expert in finding plagiarized code.