Research Interests

My research areas fall on the intersection of Mobile Systems, Speech Processing, and Wireless Communications.

Speech Processing

[USENIX Security 2025] AUDIO WATERMARK: Dynamic and Harmless Watermark for Black-box Voice Dataset Copyright Protection

Authors: Hanqing Guo, Junfeng Guo, Bocheng Chen, Yuanda Wang, Xun Chen, Heng Huang, Qiben Yan, Li Xiao

Keyword: IP Protection, Watermark, AI security

Project Code

[Mobicom 2024] WavePurifier: Purifying Audio Adversarial Examples via Hierarchical Diffusion Models

Authors: Hanqing Guo, Guangjing Wang, Bocheng Chen, Yuanda Wang, Xiao Zhang, Xun Chen, Qiben Yan, Li Xiao

Keyword: AI security, speech recognition, diffusion model, mobile security

Project Paper Code

[Mobicom 2023] MASTERKEY: Practical Backdoor Attack Against Speaker Verification Systems

Authors: Hanqing Guo, Xun Chen, Junfeng Guo, Li Xiao, Qiben Yan

Keyword: Backdoor attack, speaker authentication, real-world attack

Project Paper Slide

[ICDE 2023] Federated IoT Interaction Vulnerability Analysis

Authors: Guangjing Wang, Hanqing Guo, Anran Li, Xiaorui Liu, Qiben Yan

Keyword: federated learning, security and privacy, explainability, IoT

Paper

[RAID 2023] PhantomSound: Black-Box, Query-Efficient Audio Adversarial Attack via Split-Second Phoneme Injection

Authors: Hanqing Guo, Guangjing Wang, Yuanda Wang, Guangjing Wang, Bocheng Chen, Qiben Yan, Li Xiao

Keyword: Adversarial attack, speech recognition, real-world attack

Paper Slide

[CCS 2022] SpecPatch: Human-In-The-Loop Adversarial Audio Spectrogram Patch Attack on Speech Recognition

Authors: Hanqing Guo, Yuanda Wang, Nikolay Ivanov, Li Xiao, Qiben Yan

Keyword: Adversarial attack, speech recognition, novel idea

Best Paper Honorable Mention Award

Project Paper Slide

[AsiaCCS 2022] SuperVoice: Text-Independent Speaker Verification Using Ultrasound Energy in Human Speech

Authors: Hanqing Guo, Qiben Yan, Nikolay Ivanov, Ying Zhu, Li Xiao, Eric J. Hunter

Keyword: Speaker authentication, anti-spoofing, ultrasound

Project Paper Slide

[NDSS 2021] Surfingattack: Interactive hidden attack on voice assistants using ultrasonic guided waves

Authors:Qiben Yan, Kehai Liu, Qin Zhou, Hanqing Guo, Ning Zhang

Keyword: Attack voice assistants, ultrasound, surface vibration

Project Paper Slide

Privacy

[ICNC 2025] Secure-IRS: Defending Against Adversarial Physical-Layer Sensing in ISAC System

Authors: Ziyu Chen, Denny Vishnu Puri Landika, Alvin Yang, Yizhu Wen, Haofan Cai, Yao Zheng, Hanqing Guo

Keyword: IRS, mmWave, Vital Sensing, Privacy-preserving

Project Paper Slides Video

[CNS 2024] Protecting Activity Sensing Data Privacy Using Hierarchical Information Dissociation

Authors: Guangjing Wang, Hanqing Guo, Yuanda Wang, Bocheng Chen, Ce Zhou, Qiben Yan

Keyword: Diffusion model, privacy-preserving data sharing, mobile sensing

Project Paper Slides Video

[WiSec 2023] VSMask: Defending Against Voice Synthesis Attack via Real-Time Predictive Perturbation

Authors: Yuanda Wang, Hanqing Guo, Guangjing Wang, Bocheng Chen, Qiben Yan

Keyword: Protect voice leakage, defend speech synthesis, real-time application

Project Paper Slides Video

[DSN 2022] NEC: Speaker Selective Cancellation via Neural Enhanced Ultrasound Shadowing

Authors: Hanqing Guo*, Chenning Li*, Lingkun Li, Zhichao Cao, Qiben Yan, Li Xiao (* indicate co-first author)

Keyword: Protect hidden recording, ultrasound, voice cancellation

Meida Cover:

ACM TechNews Project Paper Slides

[ICC 2020] Deep Learning Driven Wireless Real-time Human Activity Recognition

Authors: Hanqing Guo, Nan Zhang, Shaoen Wu, Qing Yang

Keyword: Activity detection, radar sensing

Paper

Usability

[SenSys 2024] PiezoBud: A Piezo-Aided Secure Earbud with Practical Speaker Authentication

Authors: Gen Li*, Huaili Zeng* Hanqing Guo, Yidong Ren, Aiden Dixon, Zhichao Cao, Tianxing Li (* indicate co-first author)

Keyword: Speaker authentication, earbud, multimodal sensor

Project Paper Slides Video

[NDSS 2022] GhostTalk: Interactive Attack on Smartphone Voice System Through Power Line

Authors: Yuanda Wang, Hanqing Guo, Qiben Yan

Keyword: Attack speech assistants, side channel, hardware

Project Paper Slides Video

[Mobicom 2022] U-star: An underwater navigation system based on passive 3d optical identification tags

Authors: Xiao Zhang, Hanqing Guo, James M Mariani, Li Xiao

Keyword: Underwater navigation, visible light communication

Paper

[SenSys 2021] NELoRa: Towards Ultra-low SNR LoRa Communication with Neural-enhanced Demodulation

Authors: Chenning Li, Hanqing Guo, Shuai Tong, Xiao Zeng, Zhichao Cao, Mi Zhang, Qiben Yan, Li Xiao, Jiliang Wang, Yunhao Liu

Keyword: Low SNR Lora, denoise, wireless IoT communication

Best Paper Award

Paper Slide Code