3 papers
cs.SD2026
SuperEar: Eavesdropping on Mobile Voice Calls via Stealthy Acoustic Metamaterials
Zhiyuan Ning, Zhanyong Tang, Juan He +4
Acoustic eavesdropping is a privacy risk, but existing attacks rarely work in real outdoor situations where people make phone calls on the move. We present SuperEar, the first port…
cs.CR2025
A Portable and Stealthy Inaudible Voice Attack Based on Acoustic Metamaterials
Zhiyuan Ning, Juan He, Zhanyong Tang +2
We present METAATTACK, the first approach to leverage acoustic metamaterials for inaudible attacks for voice control systems. Compared to the state-of-the-art inaudible attacks req…
cs.SD2025
MetaGuardian: Enhancing Voice Assistant Security through Advanced Acoustic Metamaterials
Zhiyuan Ning, Zheng Wang, Zhanyong Tang
We present MetaGuardian, a voice assistant (VA) protection system based on acoustic metamaterials. MetaGuardian can be directly integrated into the enclosures of various smart devi…