Hyoungshick Kim

schoolSungkyunkwan Universitybar_chart#2291 Global Rank

Total Papers

HCI Rank

#2291

Research Areas

Years Active

Recent Publications

Mind the SIM: Awareness and Mental Models in a South Korean Case Study

Mobile phone numbers function as single keys to banking, government, and commerce, making the Subscriber Identity Module (SIM) a critical element of security. In April 2025, South Korea’s largest carrier experienced a SIM breach that compromised authentication keys and exposed nearly 27 million subscriber identifiers.…

CHI '264th AuthorAI Ethics, Fairness & Accountability +2

"I just have faith in my wallet to not mismanage my crypto": Investigating Changes in Users' Security Perceptions Post-FTX Collapse

Non-custodial wallets (NCWs) grant users full control over their keys and crypto assets, whereas custodial wallets (CWs) rely on centralized exchanges. Security breaches at major exchanges are on the rise, exemplified by the 2022 FTX fraud, yet their influence on users' security perceptions and risk mitigation behavio…

CHI '25CorrespondingPasswords & Authentication +1

Understanding and Improving User Adoption and Security Awareness in Password Checkup Services

Password checkup services (PCS) identify compromised, reused, or weak passwords, helping users secure at-risk accounts. However, adoption rates are low. We investigated factors influencing PCS use and password change challenges via an online survey (n=238). Key adoption factors were "perceived usefulness," "ease of us…

CHI '25CorrespondingPrivacy by Design & User Control +1

I Was Told to Install the Antivirus App, but I'm Not Sure I Need It: Understanding Smartphone Antivirus Software Adoption and User Perceptions

The rising threat of mobile malware has prompted security vendors to recommend antivirus software for smartphones, yet user misconceptions, regulatory requirements, and improper use undermine its effectiveness. Our mixed-method study, consisting of in-depth interviews with 23 participants and a survey of 250 participa…

UBICOMP '235th+ AuthorPasswords & 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…

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