Trusted Peer-To-Peer Systems

该项目将为可信系统开发技术，这些技术可以在需要时提供正确的信息并采取正确的行动。重点将放在点对点(P2P)系统上，在P2P系统中，计算机或节点自主操作，没有任何中央控制。在P2P系统中，每个节点提供存储和计算资源。它连接到其他邻居节点，社区提供文件共享、文档存档或数据分析等服务。P2P系统特别适合作为可信系统的“骨干”，因为节点独立运行，不依赖于特定的网络连接或具有固定功能的节点。因此，P2P系统可以适应不断变化的环境，并通过适当的机制来隔离或忽略恶意节点。作为该项目的一部分，将解决几个重要问题，例如：拒绝服务(DoS)：如何防御产生过多负载的恶意站点，以防止其他人获得资源或服务？搜索：如何在不使用集中式索引设施的情况下，在动态变化的环境中高效地查找信息？信息真实性：如何验证文档或信息的真实性？保存：如何在始发节点的生命周期之后保存信息？拟议的研究风险很高，但也有可能获得巨大回报。这项研究风险很高，因为面临的问题很困难：用可能是暂时的和恶意的构建块构建一个受信任的社区并不是一项容易的任务。然而，按照建议，构建可信系统的唯一方法是对其组件的可信性做出尽可能少的假设。即将开发的技术如果成功，将为为电子商务、军事应用、医疗保健和许多其他应用构建真正可靠、安全和可信的系统提供坚实的基础。

This project will develop techniques for trusted systems that can provide correct information and take correct actions when needed and where needed. The focus will be on peer-to-peer (P2P) systems, where computers or nodes operate autonomously, without any central control. In a P2P system, each node provides storage and compute resources. It connects to other neighbor nodes, and the community provides services like file sharing, document archiving, or data analysis.P2P systems are especially well suited as the "backbone" of a trusted system because nodes operate independently, without reliance on particular network connections or on nodes with a fixed functionality. Thus, a P2P system can adapt to a changing environment, and with the proper mechanisms, can isolate or ignore malicious nodes.As part of the project, several important problems will be addressed such as: Denial of Service (DoS): How does one protect against malicious sites that generate excess load to prevent others from receiving resources or service?Searching: How does one efficiently find information without using centralized index facilities, and in a dynamically changing environment? Information Authenticity: How does one verify the authenticity of documents or information? Preservation: How does one preserve information past the lifetime of the originating node?The proposed research is high risk, but there is also the potential for a large payoff. The research is high risk because the problems faced are difficult: Building a trusted community out of building blocks that may be transient and malicious, is not an easy task. However, the only way to build a trusted system is, as proposed, by making as few assumptions as possible about the trustworthiness of its components. The techniques to be developed, if successful, will provide a solid foundation for building truly reliable, secure, and trusted systems for electronic commerce, military applications, healthcare, and many other applications.