Towards Principled Risk Scores for Space Cyber Risk Management
CoRR(2024)
摘要
Space is an emerging domain critical to humankind. Correspondingly, space
cybersecurity is an emerging field with much research to be done. To help space
cybersecurity practitioners better manage cyber risks, The Aerospace
Corporation proposed Notional Risk Scores (NRS) within their Space Attack
Research and Tactic Analysis (SPARTA) framework, which can be applied to
quantify the cyber risks associated with space infrastructures and systems.
While intended for adoption by practitioners, NRS has not been analyzed with
real-world scenarios, putting its effectiveness into question. In this paper we
analyze NRS via a real-world cyber attack scenario against a satellite, and
characterize the strengths, weaknesses, and applicability of NRS. The
characterization prompts us to propose a set of desired properties to guide the
design of future NRS. As a first step along this direction, we further propose
a formalism to serve as a baseline for designing future NRS with those desired
properties.
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