1. DBPD: A Dynamic Birthmark-based Software Plagiarism Detection Tool
Zhenzhou Tian
MOE Key Lab for Intelligent Networks and Network Security
Xi’an Jiaotong University, China
2017/4/23

2. Introduction
Software plagiarism has been a serious threat to the healthy development of software industry
Violate licenses for commercial interests or unwittingly
Weak code protection awareness
Powerful automated code obfuscation tools
Distributed in binary form

3. Introduction Many software birthmark based techniques are proposed
Static Birthmarks: CVFV,SMC,IS,UC…
Dynamic Birthmarks: WPP, SCSSB, SCDG, DKISB…
Seldom tools are publically available
Dynamic birthmarks are believed to perform better than static birthmarks
Tool
Static/Dynamic
Language
Sandmark
Static
Java bytecode
Stigmata
Birthmarking
Dynamic
JPlag
Source code
constant values in field variables, sequence of method calls, inheritance structure and used classes

4. Framework of DBPD Software Birthmark Design Overview
A set of characteristics extracted from a program that reflects intrinsic properties of the program, and which can be used to identify the program uniquely.
Design Overview

5. Three Dynamic Birthmarks
Three Birthmark Approaches Implemented
DKISB: Dynamic Key Instruction Sequence Birthmark
Generated using k-gram algorithm from dynamic key instructions (instructions that are both value updating and input correlated).
SCSSB: System Call Short Sequence Birthmark
Extracted by splitting system call sequence into short sub-sequences
SODB: Stack Operation Dynamic Birthmark
Generated by analyzing the behavior of stack operations, utilizing the law of push and pop operation of call stack to uniquely identify a program

6. Independently implemented software with similar functionalities
Demonstration
Independently implemented software with similar functionalities

7. Plagiarism Using Different Compilers and Optimization Levels
Demonstration
Plagiarism Using Different Compilers and Optimization Levels

8. Plagiarism Using Specific Obfuscation Tools
Demonstration
Plagiarism Using Specific Obfuscation Tools

9. Cross-Platform Plagiarism Scenario
Demonstration
Cross-Platform Plagiarism Scenario

10. Some Definitions

11. Some Definitions