What we work on

Personal mobile and wearable devices have become the trusted vault for identity, health, location, and payments. Yet the same trends that make these devices indispensable, short-lived connections, miniaturized form factors, and minimal user interfaces, make traditional security mechanisms like passwords and complex pairing flows impractical.

The lab designs authentication, pairing, and secure-sensing primitives that work transparently on smartphones, smartwatches, earbuds, and embedded camera modules. Our methods derive shared secrets from the physical context the user is already in (vibration, ambient electromagnetic radiation, image-sensor noise), instead of asking the user to type a passkey or trust a remote service.

Selected systems

  • AeroKey, over-the-air authentication using ambient electromagnetic radiation. No extra hardware on the device.
  • SyncVibe, pairing via short bursts of physical vibration between devices in direct contact.
  • PARAVIRT, userland container isolation that lets untrusted apps coexist on a single mobile device.

Publications in this area

  • ACTAUTH: Interaction-Triggered, Continuous User Authentication for Controller-Free Virtual Reality

    Haoran Li, Omar Achkar, George Zouridakis, Xin Fu, Kyu In Lee

    Accepted in IEEE International Conference on Cyber Security and Resilience (CSR) · 2026

  • PARAVIRT: Userland Containers for Mobile Systems

    Isaac Ahlgren, Yasin N. Silva, Eric Chan-Tin, George K. Thiruvathukal, Kyu In Lee, Neil Klingensmith

    IEEE International Conference on Intelligent Mobile Computing (IMC) · 2025

  • AeroKey: Using Ambient Electromagnetic Radiation for Secure and Usable Wireless Device Authentication

    Kyuin Lee, Yucheng Yang, Omkar Prabhune, Aishwarya Lekshmi Chithra, Jack West, Kassem Fawaz, Neil Klingensmith, Suman Banerjee, Younghyun Kim

    Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT) · 2022

  • PEDRO: Secure Pedestrian Mobility Verification in V2P Communication using COTS Mobile Devices

    Yucheng Yang*, Kyuin Lee*, Younghyun Kim, Kassem Fawaz

    ACM Workshop on CPS & IoT Security and Privacy (CPSIoTSec) · 2021

  • SyncVibe: Fast and Secure Device Pairing through Physical Vibration on Commodity Smartphones

    Kyuin Lee, Vijay Raghunathan, Anand Raghunathan, Younghyun Kim

    IEEE International Conference on Computer Design (ICCD) · 2018

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