zkDaily - 2026-04-23

零知识证明 zkDaily

ZKP Frontier Tracker 🎯

Thu

04.23

2026

ZK-VSA: Zero-Knowledge Verifiable Speaker Anonymization Leveraging Phase Vocoder with Time-Scale Modification

Paper

https://ieeexplore.ieee.org/document/11462079

Shuang Liang Speaker Anonymization

@icerdesign et al. proposed ZK-VSA, a zero-knowledge verifiable speaker anonymization method using zkSNARKs and phase vocoder for public verification while preserving privacy.

Notes

Introduced VSA paradigm for publicly verifiable speaker anonymization, preventing original speech exposure.
Designed arithmetic constraints with zkSNARKs for PV-TSM, minimizing accuracy loss.
Integrated cryptographic commitments and signatures for authentication, resisting inversion and re-identification attacks.
Evaluated on LibriSpeech with minimal proof overhead and millisecond verification.
Suitable for forensic applications requiring auditability and privacy, ensuring evidence integrity.
Opens path for proof-based guarantees in broader speech transformations, advancing privacy tech.

Collected by @icerdesign

零知识证明 zkDaily

Q&A Deep Dive 💬

Thu

04.23

2026

What role does PV-TSM play in ZK-VSA?

PV-TSM is the core anonymization function. It modifies speech phase to hide identity and is simple enough to be encoded into arithmetic circuits for ZK proofs.

Why must PV-TSM be redesigned for arithmetic circuits?

Original PV-TSM relies on floating-point, modulo, and division, which are costly in finite-field circuits. ZK-VSA converts them into additions and multiplications using scaling, bit decomposition, and remainder constraints, reducing proof complexity.

What does “reducing constraint explosion” mean in ZK-VSA?

Constraint explosion refers to the rapid growth of constraints when complex operations are directly encoded. For example, floating-point or division introduces many constraints. ZK-VSA avoids this by using integer scaling, bit-based modulo, and quotient-remainder checks to keep constraints small.

Prompted by @icerdesign