航空学报 > 2026, Vol. 47 Issue (18): 532891-532891   doi: 10.7527/S1000-6893.2025.32891

空天地一体化智能网联专刊

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通感一体化内生安全威胁及其跨层防御综述

王诗悦, 程凯欣, 陈昱帆, 王磊, 孙佳琛, 谷江春, 朱磊()   

  1. 陆军工程大学 通信工程学院,南京 210007
  • 收稿日期:2025-10-10 修回日期:2025-10-29 接受日期:2025-12-08 出版日期:2025-12-25 发布日期:2025-12-23
  • 通讯作者: 朱磊
  • 基金资助:
    国家自然科学基金(62471486); 国家自然科学基金(62501637)

A review of endogenous security threats and cross-layer defense mechanisms in integrated sensing and communication system

Shiyue WANG, Kaixin CHENG, Yufan CHEN, Lei WANG, Jiachen SUN, Jiangchun GU, Lei ZHU()   

  1. College of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China
  • Received:2025-10-10 Revised:2025-10-29 Accepted:2025-12-08 Online:2025-12-25 Published:2025-12-23
  • Contact: Lei ZHU
  • Supported by:
    National Natural Science Foundation of China(62471486)

摘要:

通感一体化(ISAC)作为6G网络的核心技术之一,在空天地一体化网络(SAGIN)领域展现出巨大应用潜力,但其融合特性也引入了复杂的内生安全威胁。针对传统网络安全机制难以兼顾通信保密性与感知实时性双重需求的问题,对ISAC系统在SAGIN中的内生安全威胁及跨层防御进行了系统性研究。首先,从波形与空口设计、频谱资源共享以及软硬件设备共享3个基础技术维度,深入剖析了ISAC系统在信号层面、数据层面与资源层面的内生脆弱性机理。其次,结合空天地应用场景的时空高动态特性,梳理了系统面临的跨层安全威胁与攻击路径,揭示了传统防御机制的局限性。随后,提出了一种跨层协同动态防御架构,该架构融合了物理层可信根基构建、跨模态数据语义安全验证以及网络层资源动态弹性调度等关键机制。研究结果表明,该体系通过防御策略的自适应调整,有效切断跨层协同攻击路径,从而为保障系统的高可用性提供显著的动态韧性。得出的理论模型与防御框架为面向未来SAGIN的针对性系统研发奠定了理论基础,并为相关航空航天高动态场景的安全业务部署提供了技术参考。

关键词: 通感一体化, 空天地一体化网络, 内生安全, 网络攻击, 动态防御模型

Abstract:

As a core technology of 6G networks, Integrated Sensing and Communication (ISAC) shows great potential in the field of Space-Air-Ground Integrated Network (SAGIN). However, its integrated nature also introduces complex endogenous security threats. To address the problem that traditional network security mechanisms struggle to balance the dual requirements of communication confidentiality and real-time sensing, this paper systematically studies the endogenous security threats and cross-layer defense of ISAC systems in SAGIN. First, from three fundamental technical dimensions, including waveform and air interface design, spectrum resource sharing, and hardware-software equipment sharing, the endogenous vulnerability mechanisms of the ISAC system at the signal, data, and resource levels are deeply analyzed. Second, considering the highly dynamic spatiotemporal characteristics of space-air-ground application scenarios, the cross-layer security threats and attack paths faced by the system are systematically outlined, revealing the limitations of traditional defense mechanisms. Subsequently, a cross-layer collaborative dynamic defense architecture is proposed, which integrates key mechanisms including the construction of a physical layer trusted foundation, cross-modal data semantic security verification, and network layer resource dynamic elastic scheduling. The results indicate that this system, through the adaptive adjustment of defense strategies, effectively cuts off cross-layer collaborative attack paths, thereby providing significant dynamic resilience for ensuring high system availability. The derived theoretical models and defense framework lay a theoretical foundation for the targeted system research and development of future SAGIN, and provide technical references for the deployment of security services in related highly dynamic aerospace scenarios.

Key words: integrated sensing and communication, space-air-ground integrated network, endogenous security, cyber attack, dynamic defense model

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