The Rise of Zero-Shot Voice Conversion

Zero-shot voice conversion (VC) allows for cloning a speaker's voice without any fine-tuning, using only a few seconds of reference audio.

How it Works

These models typically disentangle the linguistic content from the speaker identity. During inference, the content from a source utterance is combined with the speaker embedding from a target reference.

Implications

The ease of use and speed of these models pose significant security risks:

• Biometric Bypass: Voice authentication systems can be easily fooled.
• Social Engineering: Attackers can impersonate trusted individuals (CEO fraud, family emergencies).

Countermeasures

We need to develop more robust liveness detection and anti-spoofing measures that go beyond simple speaker verification.