EAGER: TC: Collaborative Research: Experimental Study of Accountability in Existing Anonymous Networks

为了防止为言论自由而设计的匿名工具被犯罪分子滥用，该项目通过利用两个独特的视角，研究了追踪犯罪分子的实际解决方案，同时支持良性用户的言论自由。首先，它利用执法部门的资源优势来探索匿名工具的局限性。由于远程犯罪分子通常没有资源来构建大规模的系统，他们不得不依靠现有的带有第三方资源的匿名工具来隐藏他们的踪迹。第二，拟议的解决方案旨在抓获一些罪犯，一开始没有一个具体的目标。这种假设大大简化了系统设计，使其具有可行性，不同于通常从一开始就针对特定目标的追溯解决方案，并且通常需要大量的大规模部署成本。该项目将研究用于异步通信的Freenet和用于交互式通信的Tor的实施限制，并为执法部门开发溯源解决方案，以识别涉及恶意交易的数据源和各方。将设计穿透这些系统的有效方法，以进行集体流量分析。通过关注已知的恶意数据共享来进一步识别恶意方，所提出的解决方案将本地化数据源和通信方。同时，保护良性用户的有效机制是什么？隐私问题也将受到调查。拟议的研究将为打击网络犯罪提供重要的见解。pi将整合研究和教育，通过NHSEMP计划招收本科生和研究生。欲了解更多信息，请访问项目网站http://www.ee.hawaii.edu/~dong/traceback。

To stop anonymous tools designed for free speech from being abused by criminals, this project investigates practical solutions to trace back criminals while support free speech for benign users, by exploiting two unique perspectives. First, it utilizes the resource advantages of law enforcement to explore the limitations of anonymous tools. As criminals operated from remote locations usually do not have resources to build large-scale systems, they have to rely on existing anonymous tools with third-party resources to hide their traces. Second, the proposed solutions aim to capture some criminals, without a specific target at the beginning. Such assumption greatly simplifies the system design and makes it feasible, different from common traceback solutions which aim at a specific target from the start and usually require heavy costs for large-scaled deployment. This project will examine the implementation limitations of Freenet for asynchronous communications and Tor for interactive communications, and develop tracing back solutions for law enforcement to identify data sources and parties involved in malicious transactions. Effective methods to penetrate these systems will be designed for collective traffic analysis. By focusing on known malicious data sharing to further identify malicious parties, the proposed solutions will localize data sources and communication parties. Meanwhile, effective mechanisms for protecting benign users? privacy will also be investigated. The proposed research will provide significant insights to fight cyber crimes. The PIs will integrate research and education to recruit undergraduate and graduate via NHSEMP Program. For further information, see the project website at http://www.ee.hawaii.edu/~dong/traceback.