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Related Work
ˇ°Several existing works have shown that STAR-RIS can significantly improve ISAC performance, while NOMA enhances multi-user efficiency.
Physical-layer security has also been studied, but mostly in separate ISAC or RIS-based systems.
However, most existing studies focus on single targets or single eavesdroppers, rely on conventional RIS architectures, or adopt high-complexity optimization methods.
To the best of our knowledge, there is no existing work addressing secure multi-user, multi-target NOMA-ISAC systems empowered by STAR-RIS with low computational complexity.
This gap motivates our work.ˇ± |