DP-VoicePub: Differential Privacy-based Voice Publication

Xin Yao, Senquan An

Abstract: The widespread use of voice assistants has generated a vast amount of user voice data, promoting technologies such as speech recognition but also bringing privacy and security risks. Voice data contains the identity information of the speaker, and a little voice data is enough for a linking attack or other malicious attacks. We use differential privacy to formally define user privacy in speech publishing and propose a differential privacy-compliant algorithm to change the user's x-vector. The user can customize our scheme to balance privacy and voice authenticity, which is significant for exploring user data privacy protection. We also evaluate our scheme on real-world datasets using a variety of existing speaker anonymization evaluation metrics. The results show that our scheme is universal and can effectively balance the privacy and authenticity of anonymized speech under different evaluation metrics.