Time-varying Bottleneck Links in LEO Satellite Networks: Identification, Exploits, and Countermeasures
Yangtao Deng
Network and Distributed System Security (NDSS) Symposium 2025 · Day 1 · Wireless, Cellular & Satellite Security
This talk, presented by Yangtao Deng from Chinua University on behalf of his colleagues, delves into the critical and under-explored area of security vulnerabilities within Low Earth Orbit (LEO) satellite networks. Specifically, the research identifies and analyzes **time-varying bottleneck links**—ground-satellite links (GSLs) that disproportionately carry traffic and are subject to dynamic changes. The presentation introduces **Skyfall**, a novel risk analyzer designed to assess the impact of **link flooding attacks (LFAs)** orchestrated by compromised user terminals (UTs) targeting these identified bottlenecks.
AI review
Legitimate systems-security research on a genuinely underexplored attack surface — LEO bottleneck exploitation via time-varying topology analysis is a real problem and Skyfall is a credible contribution. The numbers are concrete, the threat model is grounded in real infrastructure, and the gap they're filling (dynamic LFA risk quantification vs. static prior work) is well-defined. What keeps this at three stars is that the work is solid but not surprising: it's essentially a careful measurement-plus-simulation paper that confirms intuitions about spatial/temporal unevenness in LEO routing…