Karola Marky

schoolRuhr University Bochumbar_chart#529 Global Rank

Total Papers

HCI Rank

#529

Research Areas

Years Active

Recent Publications

Sensing Your Vocals: Exploring the Activity of Vocal Cord Muscles for Pitch Assessment Using Electromyography and Ultrasonography

Vocal training is difficult because the muscles that control pitch, resonance, and phonation are internal and invisible to learners. This paper investigates how Electromyography (EMG) and ultrasonic imaging (UI) can make these muscles observable for training purposes. We report three studies. First, we analyze the E…

CHI '263rd AuthorPrivacy by Design & User Control +3

It Shouldn't Be This Difficult: Researcher Perspectives on Diversity and Inclusion in Usable Privacy and Security Research

While recent usable privacy and security (UPS) research has made progress in moving beyond “the average user,” a systematic account of how UPS researchers navigate diversity and inclusion in their work remains lacking. Through 20 in-depth semi-structured interviews with experienced researchers, we examine how and why…

CHI '25CorrespondingPrivacy by Design & User Control +2

The TaPSI Research Framework - A Systematization of Knowledge on Tangible Privacy and Security Interfaces

This paper presents a comprehensive Systematization of Knowledge on tangible privacy and security interfaces (TaPSI). Tangible interfaces provide physical forms for digital interactions. They can offer significant benefits for privacy and security applications by making complex and abstract security concepts more intu…

CHI '253rd AuthorPrivacy by Design & User Control +1

Security Knight in Shining Armor: What and Who VPN Providers Claim to Shield Consumers Against

Consumer virtual private network (VPN) providers promise online security and privacy by tunneling user traffic through their servers. However, there is a growing disparity between the users' perceptions of achievable security and privacy and the actual limitations of such services. In a large-scale, multi-step mixed m…

CHI '253rd AuthorPasswords & Authentication +1

A Qualitative Study of Adoption Barriers and Challenges for Passwordless Authentication in German Public Administrations

Public administrations provide critical services and manage sensitive data for a country's citizens. Recent phishing campaigns targeting public sector employees highlight their attractiveness as targets. Deploying state-of-the-art authentication technologies, such as FIDO2, can improve overall security. We conducted a…

CHI '24CorrespondingHonorable MentionPrivacy by Design & User Control +1

Do You Need to Touch? Exploring Correlations between Personal Attributes and Preferences for Tangible Privacy Mechanisms

This paper explores how personal attributes, such as age, gender, technological expertise, or "need for touch", correlate with people's preferences for properties of tangible privacy protection mechanisms, for example, physically covering a camera. For this, we conducted an online survey (N = 444) where we captured pa…

CHI '242nd AuthorPrivacy by Design & User Control +1

Out-of-Device Privacy Unveiled: Designing and Validating the Out-of-Device Privacy Scale (ODPS)

This paper proposes an Out-of-Device Privacy Scale (ODPS) - a reliable, validated psychometric privacy scale that measures users’ importance of out-of-device privacy. In contrast to existing scales, ODPS is designed to capture the importance individuals attribute to protecting personal information from out-of-device t…

CHI '241st AuthorPrivacy by Design & User Control +3

Decide Yourself or Delegate - User Preferences Regarding the Autonomy of Personal Privacy Assistants in Private IoT-Equipped Environments

Personalized privacy assistants (PPAs) communicate privacy-related decisions of their users to Internet of Things (IoT) devices. There are different ways to implement PPAs by varying the degree of autonomy or decision model. This paper investigates user perceptions of PPA autonomy models and privacy profiles - archety…

UBICOMP '235th+ AuthorPrivacy by Design & User Control +1

Privacy-Enhancing Technology and Everyday Augmented Reality: Understanding Bystanders’ Varying Needs for Awareness and Consent

Fundamental to Augmented Reality (AR) headsets is their capacity to visually and aurally sense the world around them, necessary to drive the positional tracking that makes rendering 3D spatial content possible. This requisite sensing also opens the door for more advanced AR-driven activities, such as augmented percept…

CHI '211st AuthorElectrical Muscle Stimulation (EMS) +2

Let’s Frets! Assisting Guitar Students during Practice via Capacitive Sensing

Learning a musical instrument requires regular exercise. However, students are often on their own during their practice sessions due to the limited time with their teachers, which increases the likelihood of mislearning playing techniques. To address this issue, we present Let's Frets - a modular guitar learning syste…

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