Choong-Hoon Lee

schoolSamsungbar_chart#5156 Global Rank

Total Papers

HCI Rank

#5156

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Years Active

Recent Publications

SkullID: Through-Skull Sound Conduction based Authentication for Smartglasses

This paper investigates the use of through-skull sound conduction to authenticate smartglass users. We mount a surface transducer on the right mastoid process to play cue signals and capture skull-transformed audio responses through contact microphones on various skull locations. We use the resultant bio-acoustic info…

UBICOMP '23CorrespondingPasswords & Authentication +1

On the Long-Term Effects of Continuous Keystroke Authentication: Keeping User Frustration Low through Behavior Adaptation

"One of the main challenges in deploying a keystroke dynamics-based continuous authentication scheme on smartphones is ensuring low error rates over time. Unstable false rejection rates (FRRs) would lead to frequent phone locks during long-term use, and deteriorating attack detection rates would jeopardize its securit…

UBICOMP '235th+ AuthorFoot & Wrist Interaction +1

WristAcoustic: Through-Wrist Acoustic Response Based Authentication for Smartwatches

PIN and pattern lock are difficult to accurately enter on small watch screens, and are vulnerable against guessing attacks. To address these problems, this paper proposes a novel implicit biometric scheme based on through-wrist acoustic responses. A cue signal is played on a surface transducer mounted on the dorsal wr…

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