Designing intuitive and privacy-focused user experiences

About Me

I am Riyadh, a Doctoral Researcher at the CISPA Helmholtz Center for Information Security. I specialize in Mobile Security, Human-Computer Interaction (HCI), and Usable Security, focusing on enhancing privacy-preserving mechanisms in Android. My goal is to bridge technical security and user-centered design, improving user experience in privacy-related decisions.

Currently, I am a member of Trusted Systems Group leads by Dr. Sven Bugiel.

Research Interest

Mobile Security
Human-Computer Interaction
Usable Security and Privacy
Immersive Technology (AR/VR)

Current Position

Ph.D. in Computer Science, 2024—Present
Saarland University, Germany
Doctoral Researcher, 2024—Present
CISPA Helmholtz Center for Information Security, Germany

Hobby

Coin/Currency Collection
(Over 93+ countries)

Publication

Usable Authentication in Virtual Reality: Exploring the Usability of PINs an Gesture

Authored by H T M A Riyadh, Divyanshu Bhardwaj, Adrian Dabrowski, Katharina Krombholz
Published on ACNS, 24. [Read here]

Glimpse: Gesture-based authentication showed higher usability and faster authentication times, especially for users with less VR experience. Findings suggest that developers should favour native interaction methods for VR rather than porting conventional systems like PIN entry.

Identify Subconscious Visual Response from Brain Signals

Authored by H T M A Riyadh, Jahangir Hossain Bhuyain, Zehara Zebin, A. Z. M. Ehtesham Chowdhury, Khandaker Tabin Hasan
Published on IHSI, 2018. [Read here]

Glimpse: Humans can subconsciously recognize objects within approximately 13 ms during rapid serial visual presentation (RSVP). EEG analysis reveals distinct neural signal bands that correlate with subconscious visual responses, particularly in the occipital lobe. The study indicates that subconscious visual responses occur at a high frame rate, highlighting rapid brain processing of familiar visual information.

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