标题： 空间网络安全测试平台：保真度框架、示例实现和特性分析 显示英文标题

标题： Space Cybersecurity Testbed: Fidelity Framework, Example Implementation, and Characterization

摘要： 针对空间基础设施（包括卫星和地面系统）的网络威胁尚未得到充分理解。 测试平台对于加深我们的理解并验证空间网络安全研究非常重要。 目前的研究现状是，关于构建测试平台的研究非常少，对测试平台的描述也十分有限。 在本文中，我们提出了一种框架，用于描述空间网络安全测试平台的精确度。 该框架包括7个属性，用于描述测试平台可以支持的系统模型、威胁模型和防御措施。 我们使用该框架来指导我们构建和描述一个已经实现的具体的测试平台，该平台包括空间段、地面段、用户段和链路段。 特别是，我们展示了该测试平台如何能够支持一些现实中发生过的空间网络攻击场景，并讨论了未来的研究方向。 显示英文摘要

摘要： Cyber threats against space infrastructures, including satellites and systems on the ground, have not been adequately understood. Testbeds are important to deepen our understanding and validate space cybersecurity studies. The state of the art is that there are very few studies on building testbeds, and there are few characterizations of testbeds. In this paper, we propose a framework for characterizing the fidelity of space cybersecurity testbeds. The framework includes 7 attributes for characterizing the system models, threat models, and defenses that can be accommodated by a testbed. We use the framework to guide us in building and characterizing a concrete testbed we have implemented, which includes space, ground, user, and link segments. In particular, we show how the testbed can accommodate some space cyber attack scenarios that have occurred in the real world, and discuss future research directions.