// research projects

Projects

Selected research systems spanning wearable biometrics, wireless sensing, and privacy-preserving security. Each project involves building real hardware-software systems and publishing at top venues.

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Biometrics UbiComp 2024 Top-tier ★
EarSlide: Secure Ear Wearable Authentication via Acoustic Fingerprint
A biometric authentication system for ear wearables that captures the unique acoustic fingerprint of each user's ear canal. When a user slides the earable in, the system records the sound propagation pattern — which is as unique as a fingerprint. No additional hardware required; uses the existing microphone and speaker in commercial earbuds.
Published at UbiComp 2024 · Melbourne, Australia
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Biometrics UbiComp 2022 Top-tier ★
ToothSonic: Earable Authentication via Acoustic Toothprint
Earable authentication using acoustic toothprint — the unique vibroacoustic signature produced when a user taps their teeth together. Transmitted through jawbone to ear canal and captured by in-ear microphone, each person's toothprint is structurally unique due to dental morphology.
UbiComp 2022 · Atlanta, GA · CCS 2021 Poster
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Biometrics Continuous Auth UbiComp 2021
EarDynamic: Continuous Authentication via Ear Canal Deformation
Continuous user authentication using dynamic ear canal deformation — as users chew, speak, or make facial expressions, the ear canal subtly changes shape. These deformation patterns, captured acoustically, are uniquely tied to facial musculature and serve as a passive continuous identity signal.
UbiComp 2021 · MobiCom 2021 Poster
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Biometrics Deepfake Defense IEEE TMC 2025
DynamicLip: Shape-Independent Authentication via Lip Articulator Dynamics
A continuous authentication system using the unique dynamics of lip articulator movement during speech. Unlike shape-based lip recognition, DynamicLip captures the temporal motion patterns of the lip muscles — which remain consistent for each individual and cannot be replicated by deepfake or generative AI systems.
IEEE TMC 2025 · Impact Factor 9.2
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RF Sensing Privacy-Preserving HICSS-59 2026
UWB-PostureGuard: Privacy-Preserving RF Sitting Posture Monitoring
A contactless ergonomic monitoring system using Ultra-Wideband (UWB) radar that continuously tracks sitting posture without cameras or wearables. Designed for office and home environments where long sitting hours cause musculoskeletal problems, while preserving user privacy.
HICSS-59 · Big Island, HI · 2026
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WiFi Sensing 3D Pose UbiComp 2022/21
GoPose & Winect: 3D Human Pose Estimation Using Commodity WiFi
Two related systems for camera-free 3D human pose estimation using commodity WiFi signals. GoPose captures 3D skeletal poses in arbitrary scenes; Winect extends this to free-form activity recognition. Both use channel state information (CSI) from off-the-shelf WiFi hardware — no depth camera needed.
UbiComp 2022 & 2021
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Head Gestures Earables HICSS-58 2025
CochlearMotion: Head Gesture Recognition via Ear Canal Deformation
A hands-free interaction system that recognizes head gestures — nod, shake, tilt — by monitoring the deformation of the ear canal as neck and facial muscles move. Built entirely on in-ear microphone signals, enabling gesture-based control for AR/VR and accessibility applications.
HICSS-58 · Big Island, HI · 2025
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Acoustic Sensing Accessibility UbiComp 2019
ObstacleWatch: Acoustic Obstacle Detection for Pedestrians
A smartphone-based system that uses acoustic signals to detect obstacles in a pedestrian's path. By analyzing reflected sound from the phone's speaker, the system alerts users about nearby obstacles — designed especially for visually impaired users navigating complex environments.
UbiComp 2019 · London, UK
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