Hyeon-Min Choi (Incheon National University), Jae-Hyeon Park (Incheon National University), Eun-Kyu Lee (Incheon National University)
Low Earth Orbit (LEO) satellite networks (LSNs) offer global low-latency backhaul, but are vulnerable to link flooding attacks (LFAs) because ISL/GSL capacities are limited and shortest-path routing is predictable. We propose Probabilistic Chunk-Dispersed Routing (PCDR), in which the source ground station probabilistically fragments each packet payload into n chunks and source-routes them in parallel over distinct paths sampled from the ECMP shortest-path set. In our SKYFALL-based simulations on a Starlink shell-1 topology under the SKYFALL and ICARUS attack models, PCDR reduces the coefficient of variation (CV) of ISL utilization and lowers the total loss over 100 s by about 17% (vs. shortest-path routing). Under the SKYFALL attack model, reaching a throughput degradation target of 0.4 requires about 55% more bots and about 57% more compromised regional blocks.