Privacy-Preserving End-to-End Full-Duplex Speech Dialogue Models
End-to-end full-duplex speech models feed user audio through an always-on LLM backbone, yet the speaker privacy implications of their hidden representations remain unexamined. Following the VoicePrivacy 2024 protocol with a lazy-informed attacker, we show that the hidden states of SALM-Duplex and Moshi leak substantial speaker identity across all transformer layers. Layer-wise and turn-wise analyses reveal that leakage persists across all layers, with SALM-Duplex showing stronger leakage in early layers while Moshi leaks uniformly, and that Linkability rises sharply within the first few turns. We propose two streaming anonymization setups using Stream-Voice-Anon: a waveform-level front-en...
| Authors | Nikita Kuzmin, Tao Zhong, Jiajun Deng et al. |
|---|---|
| Primary category | eess.AS |
| Published | 9 March 2026 |
| Last updated at source | 9 March 2026 |
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