软件抄袭已成为软件生态环境健康发展的威胁之一。而通常情况下源码的缺失、大量自动化混淆技术和工具的出现、抄袭与检测过程的信息不对称等，使得软件抄袭检测成为一项非常有挑战性的任务。针对现有方法暴露的源码依赖、抗混淆能力弱、难以应对部分抄袭、证据缺失等问题，项目拟结合当下主流的基于软件胎记的抄袭检测技术框架，通过优化已有的胎记构建-比较-检测阶段，引入新的抄袭证据生成阶段，形成四段式的抄袭检测及证据生成方案。具体需研究：1）行为和语义感知的函数级胎记构建和相似性比较方法；2）基于多胎记优势互补的抄袭检测方法；3）基于证据图和抄袭手段推断的抄袭证据生成方法；从而提出面向目标代码的、混淆对抗、支持部分抄袭检测、具备证据生成能力的软件胎记新技术。项目的实施将进一步完善现有软件胎记技术的理论方法体系，贡献更具现实应用价值的抄袭检测技术和工具，推进软件知识产权保护及其相关领域的研究进展。

Software plagiarism has become a serious threat to the healthy development of the software ecosystem. Yet, the unavailability of source code, the burst of mature automated code obfuscation techniques and tools, and the information asymmetry between the plagiarism and detection processes, are a few reasons making plagiarism detection a daunting task. Existing software plagiarism detection methods expose from different aspects limitations, such as require access to the source code, not resilient against code obfuscations, can not handle partial plagiarisms, and provide little evidence of plagiarism. On the basis of the popular software birthmark based plagiarism detection framework, we attempt to extend it to a four-phase detection and evidence generation framework, by optimizing the existing birthmark construction, comparison and plagiarism detection phases, as well as introducing a new phase-evidence generation. Novel object code oriented and obfuscation resilient software birthmarking methods that support partial plagiarism detection as well as evidence generation of plagiarism shall be proposed, by studying 1) behavior and semantics aware function-level birthmark construction and matched birthmark similarity comparison methods; 2) enhanced detection methods utilizing the complementary advantages of different birthmarks; 3) plagiarism evidence generation methods based on the construction of evidence graphs and the inference of possible plagiarism means. Through the implementation of the project, further improved theoretical system of software birthmarking and more practical plagiarism detection techniques and tools can be expected, which help promote the researches on software intellectual property protection and relevant fields.