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Article

DMSR: Dynamic Multipath Secure Routing Against Eavesdropping in Space-Ground Integrated Optical Networks

1
Department of Computer Science, Tsinghua University, Beijing 100084, China
2
The 54th Research Institute of China Electronics Technology Group Corporation; Shijiazhuang 050081, China
*
Author to whom correspondence should be addressed.
Photonics 2025, 12(10), 1039; https://doi.org/10.3390/photonics12101039
Submission received: 23 September 2025 / Revised: 15 October 2025 / Accepted: 20 October 2025 / Published: 21 October 2025

Abstract

With the continuous growth of global communication demands, the space-ground integrated optical network (SGION), composed of the satellite optical network (SON) and terrestrial optical network (TON), has gradually become a critical component of global communication systems due to its wide coverage, low latency, and large bandwidth. However, although the high directivity of laser communication can significantly enhance the security of data transmission, it still carries the risk of being eavesdropped on during the process of service routing. To resist eavesdropping attacks during service transmission in the SGION, this paper proposes a secure routing scheme named dynamic multipath secure routing (DMSR). In DMSR, a metric called the service eavesdropping ratio (SER) is defined to quantify the service leakage severity. The objective of DMSR is to reduce each service’s SER by switching its routing path proactively. To realize DMSR, heuristic algorithms are developed to sequentially search for optimal routing paths for service path switching in the TON and SGION. Finally, simulation results demonstrate that DMSR can achieve trade-offs between secure service transmission and network performance at different levels by adjusting its system parameters. Furthermore, the DMSR scheme significantly reduces the SER compared to the baseline schemes, while introducing acceptable increases in computation overhead and service latency.
Keywords: space-ground integrated optical network (SGION); eavesdropping attack; secure routing scheme space-ground integrated optical network (SGION); eavesdropping attack; secure routing scheme

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MDPI and ACS Style

Wang, G.; Wang, X. DMSR: Dynamic Multipath Secure Routing Against Eavesdropping in Space-Ground Integrated Optical Networks. Photonics 2025, 12, 1039. https://doi.org/10.3390/photonics12101039

AMA Style

Wang G, Wang X. DMSR: Dynamic Multipath Secure Routing Against Eavesdropping in Space-Ground Integrated Optical Networks. Photonics. 2025; 12(10):1039. https://doi.org/10.3390/photonics12101039

Chicago/Turabian Style

Wang, Guan, and Xingmei Wang. 2025. "DMSR: Dynamic Multipath Secure Routing Against Eavesdropping in Space-Ground Integrated Optical Networks" Photonics 12, no. 10: 1039. https://doi.org/10.3390/photonics12101039

APA Style

Wang, G., & Wang, X. (2025). DMSR: Dynamic Multipath Secure Routing Against Eavesdropping in Space-Ground Integrated Optical Networks. Photonics, 12(10), 1039. https://doi.org/10.3390/photonics12101039

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