Showing cs.SDShow all
3 papers · 1 filter
cs.SD2026
Before the Mic: Physical-Layer Voiceprint Anonymization with Acoustic Metamaterials
Zhiyuan Ning, Zhanyong Tang, Xiaojiang Chen +1
Voiceprints are widely used for authentication; however, they are easily captured in public settings and cannot be revoked once leaked. Existing anonymization systems operate insid…
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…
cs.SD2025
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…