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<!DOCTYPE html>
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<title>Tu Le</title>
<meta content="University of Alabama's CS Prof" name="description">
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<body class="index-page">
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<h1 class="sitename">Tu Le</h1>
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<p>Assistant Professor</p>
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<div class="logo d-flex align-items-center justify-content-center">
<p>Computer Science</p>
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<p>The University of Alabama</p>
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<div class="social-links text-center">
<a target="_blank" aria-label="Email" href="mailto:tle6@ua.edu" class="email"><i class="bi bi-envelope"></i></a>
<a target="_blank" aria-label="Google Scholar" href="https://scholar.google.com/citations?hl=en&user=JS1jU8IAAAAJ&view_op=list_works&sortby=pubdate" class="google-scholar"><i class="bi bi-google"></i></a>
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<li><a href="#about" class="active"><i class="bi bi-house navicon"></i> About</a></li>
<li><a href="#publications"><i class="bi bi-file-earmark-text navicon"></i> Publications</a></li>
<li><a href="#students"><i class="bi bi-person navicon"></i> Students</a></li>
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<main class="main">
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<section id="about" class="about section">
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<h2>About</h2>
<p>I am a tenure track assistant professor at the University of Alabama. Previously, I was a postdoctoral scholar with the <a target="_blank" href="https://properdata.eng.uci.edu/">ProperData Center</a> and the University of California, Irvine. I completed a PhD in Computer Science in 2023, advised by <a target="_blank" href="https://www.ytian.info">Prof. Yuan Tian</a>.</p>
<br>
<p>My research interests broadly include Security and Privacy, Human-centered Computing, and Emerging Technologies, with applications to smart systems (AI/ML) and public policy (law & policy). Specifically, my work focuses on usable security and privacy for emerging technologies (e.g., IoT, AI, XR) and the implications of technology and policy. The overarching goal is to bridge the gaps between computing applications’ behaviors and user perceptions/preferences as well as inform secure and privacy-respecting designs for future smart systems.</p>
<br>
<div style="font-weight: bold" class="alert alert-primary d-inline-block" role="alert">
I am looking for motivated students to join my research group.
</div>
</div><!-- End Section Title -->
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<h2>News</h2>
<ul>
<li>Dec 2025: New paper accepted at USEC 2026.</li>
<li>Aug 2025: New paper accepted at ACM IMC 2025.</li>
<li>Apr 2025: Tu is joining the University of Alabama as their new tenure track professor in Fall 2025.</li>
<li>Mar 2025: New paper accepted at PETS 2025.</li>
</ul>
</div><!-- End Section Title -->
</section><!-- /About Section -->
<!-- Publications Section -->
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<h2>Recent Publications</h2>
<p>For a full list of publications, please view <a target="_blank" href="https://scholar.google.com/citations?hl=en&user=JS1jU8IAAAAJ&view_op=list_works&sortby=pubdate">my Google Scholar page</a>.</p>
<br>
<div class="list-group">
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Actions Speak Louder Than Chats: Investigating AI Chatbot Age Gating</p>
<small class="text-muted">2026</small>
</div>
<p class="mb-1">O. Figueira, P. Chamarthi, T. Le, A. Markopoulou</p>
<small class="text-muted">Under review.</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2602.10251')" type="button" class="btn btn-info">Preprint</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">When Kids Mode Isn't For Kids: Investigating TikTok's "Under 13 Experience"</p>
<small class="text-muted">2026</small>
</div>
<p class="mb-1">O. Figueira, P. Chamarthi, T. Le, A. Markopoulou</p>
<small class="text-muted">Under review.</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2507.00299')" type="button" class="btn btn-info">Preprint</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">VBIT: Towards Enhancing Privacy Control Over IoT Devices</p>
<small class="text-muted">2026</small>
</div>
<p class="mb-1">J. Al Aaraj, O. Figueira, T. Le, I. Figueira, R. Trimananda, A. Markopoulou</p>
<small class="text-muted">Under review.</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2409.06233')" type="button" class="btn btn-info">Preprint</button>
<button onclick="window.open('https://athinagroup.eng.uci.edu/iot-tracking')" type="button" class="btn btn-info">Demo Videos</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">VR ProfiLens: User Profiling Risks in Consumer Virtual Reality Apps</p>
<small class="text-muted">San Diego, CA, USA, February 2026</small>
</div>
<p class="mb-1">I. Jarin, O. Figueira, Y. Duan, T. Le, A. Markopoulou</p>
<small class="text-muted">Symposium on Usable Security and Privacy (USEC)</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2601.12563')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://github.com/UCI-Networking-Group/VR-Profilens')" type="button" class="btn btn-info">Code</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">From Voice to Ads: Auditing Commercial Smart Speakers for Targeted Advertising based on Voice Characteristics</p>
<small class="text-muted">Madison, WI, USA, October 2025</small>
</div>
<p class="mb-1">T. Le, L. Baldesi, A. Markopoulou, C. Butts, Z. Shafiq</p>
<small class="text-muted">ACM Internet Measurement Conference (IMC)</small>
<br>
<button onclick="window.open('https://dl.acm.org/doi/10.1145/3730567.3764444')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://github.com/UCI-Networking-Group/FromVoiceToAds')" type="button" class="btn btn-info">Code</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">"Free WiFi is not ultimately free": Privacy Perceptions of Users in the US regarding City-wide WiFi Services</p>
<small class="text-muted">Washington DC, USA, July 2025</small>
</div>
<p class="mb-1">P. Mandal, T. Le, A. Ami, Y. Tian, A. Nadkarni</p>
<small class="text-muted">Privacy Enhancing Technologies Symposium (PETS)</small>
<br>
<button onclick="window.open('https://petsymposium.org/popets/2025/popets-2025-0111.pdf')" type="button" class="btn btn-info">Paper</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Alexa, is the skill always safe? Uncover Lenient Skill Vetting Process and Protect User Privacy at Run Time</p>
<small class="text-muted">Lisbon, Portugal, May 2024</small>
</div>
<p class="mb-1">T. Le, D. Zhao, Z. Wang, X. Wang, Y. Tian</p>
<small class="text-muted">International Conference on Software Engineering (ICSE)</small>
<br>
<button onclick="window.open('https://dl.acm.org/doi/pdf/10.1145/3639475.3640102')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://www.youtube.com/watch?v=rnHP6J3mbTw')" type="button" class="btn btn-info">Talk</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Towards Real-time Voice Interaction Data Collection Monitoring and Ambient Light Privacy Notification for Voice-controlled Services</p>
<small class="text-muted">San Diego, CA, USA, February 2024</small>
</div>
<p class="mb-1">T. Le, Z. Wang, D. Huang, Y. Yao, Y. Tian</p>
<small class="text-muted">Symposium on Usable Security and Privacy (USEC)</small>
<br>
<button onclick="window.open('https://www.ndss-symposium.org/wp-content/uploads/usec2024-39-paper.pdf')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://www.youtube.com/watch?v=XFeZvQuRWGk&t=12030s')" type="button" class="btn btn-info">Talk</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Exploring Smart Commercial Building Occupants' Perceptions and Notification Preferences of IoT Data Collection</p>
<small class="text-muted">Delft, Netherlands, July 2023</small>
</div>
<p class="mb-1">T. Le, A. Wang, Y. Yao, Y. Feng, A. Heydarian, N. Sadeh, Y. Tian</p>
<small class="text-muted">IEEE European Symposium on Security and Privacy (EuroS&P)</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2303.04955')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://youtu.be/XZNx4DWI7HY')" type="button" class="btn btn-info">Talk</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Towards Usable Parental Control for Voice Assistants</p>
<small class="text-muted">San Antonio, TX, USA, May 2023</small>
</div>
<p class="mb-1">P. Yang, J. Fan, Z. Wei, H. Li, T. Le, Y. Tian</p>
<small class="text-muted">Cyber-Physical Systems and Internet of Things Week (CPS-IoT)</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2303.04957')" type="button" class="btn btn-info">Paper</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">SkillBot: Identifying Risky Content for Children in Alexa Skills</p>
<small class="text-muted">July 2022</small>
</div>
<p class="mb-1">T. Le, D. Huang, N. Apthorpe, Y. Tian</p>
<small class="text-muted">ACM Transactions on Internet Technology (TOIT)</small>
<br>
<button onclick="window.open('https://arxiv.org/pdf/2102.03382')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://github.com/lenhattu/SkillBot')" type="button" class="btn btn-info">Code</button>
</div>
<div class="list-group-item list-group-item-action">
<div class="d-flex w-100 justify-content-between">
<p class="mb-1 fw-bold">Intent Classification and Slot Filling for Privacy Policies</p>
<small class="text-muted">Bangkok, Thailand, August 2021</small>
</div>
<p class="mb-1">W. Ahmad, J. Chi, T. Le, T. Norton, Y. Tian, KW. Chang</p>
<small class="text-muted">Annual Meeting of the Association for Computational Linguistics (ACL)</small>
<br>
<button onclick="window.open('https://aclanthology.org/2021.acl-long.340/')" type="button" class="btn btn-info">Paper</button>
<button onclick="window.open('https://www.youtube.com/watch?v=GXS6XgwAMdE')" type="button" class="btn btn-info">Talk</button>
<button onclick="window.open('https://github.com/wasiahmad/PolicyIE')" type="button" class="btn btn-info">Code</button>
</div>
</div>
</div><!-- End Section Title -->
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<h2>Students</h2>
<h3>PhD Students</h3>
<ul>
<li>Kofi Ampomah (08/2025 - present)</li>
<li>Ismat Jarin (Athina's group, UC Irvine)</li>
<li>Olivia Figueira (Athina's group, UC Irvine)</li>
<li>Jad Al Aaraj (Athina's group, UC Irvine)</li>
</ul>
<h3>Master's and Undergraduate Students</h3>
<ul>
<li>TBA</li>
</ul>
</div><!-- End Section Title -->
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<h2>Teaching</h2>
<ul>
<li style="font-weight: bold;">CS 491/591: Usable Security and Privacy (Fall 2026)</li>
<ul>
<li>The goals of this course are: (1) to learn about topics at the intersection of security/privacy and HCI; (2) to learn how to design and conduct experiments to study usability and human factors in security/privacy.</li>
</ul>
<li style="font-weight: bold;">CS 691: Human-Centered Security and Privacy (Spring 2026)</li>
<ul>
<li>This course is a graduate-level special topics course.</li>
<li>The goals of this course are: (1) to learn about topics at the intersection of security/privacy and HCI; (2) to learn how to design and conduct experiments to study usability and human factors in security/privacy.</li>
</ul>
</ul>
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