Wei Song
I am current a Postdoctoral Research Fellow @ UNSW, working with Prof. Jingling Xue, Prof. Yulei Sui, Prof. Zhenchang Xing, and Prof. Liming Zhu. I received my PhD in Computer Science from UNSW Sydney, supervised by Prof. Jingling Xue.
My research interests focus on AI Security, with particular emphasis on the following areas:
- 🔒AI watermarking for images, videos, and code
- 🛡️Adversarial video attacks and defenses
- 🔍Security analysis for Video Large Language Models
- ⚖️Fairness for Video Large Language Models
- 🤖AI CAPTCHA
Highlights
- 01/2026 Our demo paper in CAPTCHA for modern web applications has been accepted by WWW 2026.
- 11/2025 Our paper in poisoning VideoLLMs has been accepted by AAAI 2026.
- 07/2025 Our paper in adversarial video defense has been accepted by RAID 2025.
- 06/2025 Our paper in hand biometric authentication has been accepted by IMWUT/UbiComp 2025.
- 05/2025 Our paper in adversarial defense for point cloud classification has been accepted by IEEE ICRA 2025.
- 06/2024 My first work on adversarial attacks/defense in AI has been accepted by USENIX Security 2024.
- 03/2024 One paper "VibMilk: Non-Intrusive Milk Spoilage Detection via Smartphone Vibration" has been accepted by IEEE IoTJ 2024.
- 01/2024 One paper "CAvatar: Real-time Human Activity Mesh Reconstruction via Tactile Carpets" has been accepted by IMWUT/UbiComp 2024.
Selected Publications
*Equal contribution
Robust CAPTCHA Using Audio Illusions in the Era of Large Language Models: from Evaluation to Advances
Ziqi Ding; Yunfeng Wang; Wei Song; Yi Liu; Gelei Deng; Nan Sun; Huadong Mo; Jingling Xue; Shidong Pan;Yuekang Li
arXiv [Paper]
NgCaptcha: A CAPTCHA Bridging the Past and the Future
Ziqi Ding; Shangzhi Xu; Wei Song; Yuekang Li
WWW (2026) Demo [Paper]
Failures to Surface Harmful Contents in Video Large Language Models
Yuxin Cao; Wei Song; Derui Wang; Jingling Xue; Jin Song Dong
AAAI (2026) [Paper]
Debiasing LLMs by Masking Unfairness-Driving Attention Heads
Tingxu Han; Wei Song; Ziqi Ding; Ziming Li; Chunrong Fang; Yuekang Li; Dongfang Liu; Zhenyu Chen; Zhenting Wang
arXiv [Paper]
ViDToken: A Video-Transformer-Based Latent Token Defense for Adversarial Video Detection
Wei Song; Zhenchang Xing; Liming Zhu; Yulei Sui; Jingling Xue
RAID (2025) [Paper]
Poisoning Prompt-Guided Sampling in Video Large Language Models
Yuxin Cao; Wei Song; Jingling Xue; Jin Song Dong
arXiv [Paper]
Help or Hurdle? Rethinking Model Context Protocol-Augmented Large Language Models
Wei Song; Haonan Zhong; Ziqi Ding;Jingling Xue; Yuekang Li
arXiv [Paper]
HandID: Towards Unobtrusive Gesture-independent User Authentication on Smartphones Using Vibration-based Hand Biometrics
Yuezhong Wu*; Wei Song*; Chun Tung Chou; Jiankun Hu; Wen Hu
IMWUT/UbiComp (2025) [Paper]
SynerGuard: A Robust Framework for Point Cloud Classification via Local Geometry and Spatial Topology
Haonan Zhong; Wei Song; Maurice Pagnucco; Yang Song
IEEE ICRA (2025) [Paper]
Correction-based Defense Against Adversarial Video Attacks via Discretization-Enhanced Video Compressive Sensing
Wei Song; Cong Cong; Haonan Zhong; Jingling Xue
USENIX Security (2024) [Paper]
VibMilk: Non-Intrusive Milk Spoilage Detection via Smartphone Vibration
Yuezhong Wu; Wei Song; Yanxiang Wang; Dong Ma; Wen Hu
IEEE IoTJ (2024) [Paper]
CAvatar: Real-time Human Activity Mesh Reconstruction via Tactile Carpets
Wenqiang Chen; Yexin Hu; Wei Song; Yingcheng Liu; Antonio Torralba; Wojciech Matusik
IMWUT/UbiComp (2024) [Paper]
Pistis: Replay Attack and Liveness Detection for Gait-Based User Authentication System on Wearable Devices Using Vibration
Wei Song; Hong Jia; Min Wang; Yuezhong Wu; Wanli Xue; Chun Tung Chou; Jiankun Hu; Wen Hu
IEEE IoTJ (2022) [Paper]
Experience
Professional Experience
- Jan 2022 - May 2022, Software Engineer, Parking Spotz
Mentor: Prof. Wen Hu - Dec 2020 - May 2021, Student Research Assistant, UNSW Cyber Security Cooperative Research Center
Supervisor: Prof. Salil Kanhere and Prof. Sanjay Jha
Teaching
- Academic tutor, COMP3331/9331 Computer Networks, UNSW, 2019-2024
- Academic tutor, COMP9444 Deep Neural Networks, UNSW, 2022
- Academic tutor, COMP4336/9336 Mobile Data Networking, UNSW, 2021
- Academic tutor, COMP4337/9337 Securing Wireless and Wireless Networks, UNSW, 2021
- Academic tutor, COMP6733 Internet of Things, UNSW, 2021
Academic Service
- 2023 Reviewer: ACM SIGCOMM, IoTDI, ACM MobiSys, IEEE/ACM ASE
- 2022 Reviewer: IPSN, ACM Sensys
- 2021 Reviewer: ACM Sensys