Secure Text Entry using a Virtual Radial Keyboard with Dynamically Resized Keys and Non-Intrusive Randomization
Yuxuan Huang, Qiao Jin, Tongyu Nie, Victoria Interrante, Evan Suma Rosenberg

TL;DR
This paper presents a secure VR text entry method using a dynamically resized radial keyboard with randomized rotation to enhance security against inference attacks, while analyzing usability tradeoffs and future improvements.
Contribution
Introduces a novel radial keyboard design with dynamic resizing and random rotation for secure VR text entry, addressing vulnerabilities in existing methods.
Findings
Significantly improves resistance to keystroke prediction attacks
Increases entry time and subjective workload compared to standard QWERTY
Shows potential for performance gains with practice
Abstract
As virtual reality (VR) becomes more widely adopted, secure and efficient text entry is an increasingly critical need. In this paper, we identify a vulnerability in a state-of-the-art secure VR text entry method and introduce a novel virtual radial keyboard designed to achieve a balance between security with usability. Keys are arranged alphabetically in a circular layout, with each key selected by controller rotation and dynamically expanding to facilitate precise selection. A randomized rotation mechanism shifts the keyboard after each keystroke, preserving relative key positions while disrupting absolute spatial mappings to protect against inference attacks. We conducted a within-subject study (N=30) comparing our method with the prior secure technique and a standard QWERTY keyboard. Results showed that the radial keyboard significantly improves resistance to keystroke prediction…
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Taxonomy
TopicsInteractive and Immersive Displays · User Authentication and Security Systems · Tactile and Sensory Interactions
