Tiantian Liu will join Xiamen University as an Assistant Professor in Fall 2025, collaborating with Professor Liang Xiao. Tiantian Liu is a Ph.D. at Zhejiang University, under the supervision of Professor Kui Ren (Dean) and Professor Feng Lin. She has published 11 papers in the fields of cybersecurity and wireless computing, including IEEE S&P, USENIX Security, TDSC, INFOCOM, ACM MobiCom, UIST, SenSys, and TOSN. She has received the Best Paper Candidate Award and SIGMOBILE Research Highlight (the first from Chinese universities) and was named an EECS Rising Star 2024 by MIT (the first from Chinese universities). She is also a reviewer for several prestigious journals and conferences, including IEEE TIFS, TDSC, TMC, Ubicomp, PeerJ, and IoTJ. Her primary research interests include intelligent IoT and multimodality, such as cross-modal enhanced voice authentication and recognition, as well as IoT security, with a focus on voice interaction security and large language model security.

🔥 News

• 2024, EECS Rising Star
• 2024, USENIX Security Grants
• 2023, IEEE S&P Travel Grants
• 2023, Sigmobile Research Highlight
• 2021, Best Paper Award Nomination in SenSys

📝 Publications

• Eguard: Mitigating Privacy Risks in LLM Embeddings from Embedding Inversion. (on submission)
  Tiantian Liu, Yao Hongwei, Tong Wu, Qin Zhan, Feng Lin, and Kui Ren

• [USENIX’24] MicGuard: A Comprehensive Detection System against Out-of-band Injection Attacks for Different Level Microphone-based Devices.
  Tiantian Liu, Feng Lin, Zhongjie Ba, Li Lu, Zhan Qin, Kui Ren
  USENIX Security Symposium (USENIX Security), 2024

• [Oakland’23] MagBackdoor: Beware of Your Loudspeaker as Backdoor of Magnetic Attack for Malicious Command Injection.
  Tiantian Liu, Feng Lin, Zhangsen Wang, Chao Wang, Zhongjie Ba, Li Lu, Wenyao Xu, Kui Ren
  IEEE Symposium on Security and Privacy (SP), 2023, pp. 3416–3431
  DOI: 10.1109/SP46215.2023.00132
  Code

• [SenSys’21] Wavoice: A Noise-resistant Multi-modal Speech Recognition System Fusing mmWave and Audio Signals.
  Tiantian Liu, Ming Gao, Feng Lin, Chao Wang, Zhongjie Ba, Jinsong Han, Wenyao Xu, Kui Ren
  Proceedings of the 19th ACM Conference on Embedded Networked Sensor Systems, 2021
  (Best Paper Award Nomination, Sigmobile Research Highlight, Acceptance rate: 18.0%)
  Code

• [UIST’23] WavoID: Robust and Secure Multi-modal User Identification via mmWave-voice Mechanism
  Tiantian Liu, Feng Lin, Chao Wang, Chenhan Xu, Xiaoyu Zhang, Zhengxiong Li, Wenyao Xu, Ming-chun Huang, Kui Ren
  Proceedings of the 36th ACM Symposium on User Interface Software and Technology, 2023 (Accepted)

• [TOSN’22] Wavoice: A mmWave-assisted Noise-resistant Speech Recognition System.
  Tiantian Liu, Chao Wang, Zhengxiong Li, Ming-chun Huang, Wenyao Xu, Feng Lin
  ACM Transactions on Sensor Networks, 2023
  DOI: 10.1145/3597457

• [TURC’23] Exploiting a Benign Loudspeaker as Magnetic Backdoor for Practical Injection Attacks.
  Tiantian Liu, Feng Lin
  Proceedings of the ACM Turing Award Celebration Conference, 2023
  DOI: 10.1145/3603165.3607443

• [GetMobile’24] A New mmWave-Speech Multimodal Speech System for Voice User Interface.
  Tiantian Liu, Feng Lin
  GetMobile: Mobile Computing and Communications, 27(4), pp. 31–35

• [MobiCom’22] mmEve: Eavesdropping on Smartphone’s Earpiece via COTS mmWave Device.
  Chao Wang, Feng Lin, Tiantian Liu, Kaidi Zheng, Zhibo Wang, Zhengxiong Li, Ming-chun Huang, Wenyao Xu, Kui Ren
  Proceedings of the 28th Annual International Conference on Mobile Computing and Networking, 2022
  (Acceptance rate: 17.8%)

• [INFOCOM’22] mmPhone: Acoustic Eavesdropping on Loudspeakers via mmWave-characterized Piezoelectric Effect.
  Chao Wang, Feng Lin, Tiantian Liu, Ziwei Liu, Yijie Shen, Zhongjie Ba, Li Lu, Wenyao Xu, Kui Ren
  IEEE INFOCOM 2022 – IEEE Conference on Computer Communications
  (Acceptance rate: 19.9%)

• [TDSC’23] MotoPrint: Reconfigurable Vibration Motor Fingerprint via Homologous Signals Learning.
  Yijie Shen, Feng Lin, Chao Wang, Tiantian Liu, Zhongjie Ba, Li Lu, Wenyao Xu, Kui Ren
  IEEE Transactions on Dependable and Secure Computing, 2023, pp. 1–15
  DOI: 10.1109/TDSC.2023.3253507

• [TDSC’23] High-quality Speech Recovery Through Soundproof Protections via mmWave Sensing.
  Chao Wang, Feng Lin, Tiantian Liu, Ziwei Liu, Yijie Shen, Zhongjie Ba, Li Lu, Wenyao Xu, Kui Ren
  IEEE Transactions on Dependable and Secure Computing, 2023

🎖 Honors and Awards

• National Scholarship, 2024
• EECS Rising Star, 2024
• USENIX Security Grants, 2024
• IEEE S&P Travel Grants, 2023
• Sigmobile Research Highlight, 2023
• Outstanding Graduate Student of the Year, Zhejiang University, 2021, 2022, 2023
• Second Prize, Final of National Artificial Intelligence Innovation Application Competition, 2021

📖 Educations

• Ph.D. in Cyberspace Security, Zhejiang University
  Sep. 2020 – Jun. 2025
  Advised by Prof. Feng Lin and Prof. Kui Ren
• B.E. in Information Engineering, Zhejiang University
  Sep. 2016 – Jun. 2020