Open Sky, Open Threats: Replay Attacks in Space Launch and Re-entry Phases

• URL: http://arxiv.org/abs/2506.17446v1
• Date: Fri, 20 Jun 2025 19:27:16 GMT
• Title: Open Sky, Open Threats: Replay Attacks in Space Launch and Re-entry Phases
• Authors: Nesrine Benchoubane, Eray Guven, Gunes Karabulut Kurt,
• Abstract summary: We study the effects of replay attacks on the integrity of uplink and downlink communications during critical phases of spacecraft communication.<n>Under replay attacks, the attacker's signal can overpower legitimate transmissions, leading to a Signal to Noise Ratio (SNR) difference of up to -7.8 dB during reentry and -6.5 dB during launch.<n>We propose a more secure receiver design incorporating a phase-coherency-dependent decision-directed equalizer with a narrowed phase-locked loop (PLL) bandwidth.
• Score: 1.4911092205861824
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper examines the effects of replay attacks on the integrity of both uplink and downlink communications during critical phases of spacecraft communication. By combining software-defined radios (SDRs) with a real-time channel emulator, we replicate realistic attack conditions on the Orion spacecraft's communication systems in both launch and reentry. Our evaluation shows that, under replay attacks, the attacker's signal can overpower legitimate transmissions, leading to a Signal to Noise Ratio (SNR) difference of up to -7.8 dB during reentry and -6.5 dB during launch. To mitigate these threats, we propose a more secure receiver design incorporating a phase-coherency-dependent decision-directed (DD) equalizer with a narrowed phase-locked loop (PLL) bandwidth. This configuration enhances resilience by making synchronization more sensitive to phase distortions caused by replay interference.

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