通感一体化内生安全威胁及其跨层防御综述OA

As a core technology of 6G networks,Integrated Sensing and Communication(ISAC)shows great poten-tial in the field of Space-Air-Ground Integrated Network(SAGIN).However,its integrated nature also introduces com-plex endogenous security threats.To address the problem that traditional network security mechanisms struggle to bal-ance 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 systemati-cally 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.