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Yomna Abdelrahman, Florian Mathis, Pascal Knierim, HASH(0x55faa085b7a0), Florian Alt, Mohamed Khamis
CueVR: Studying the Usability of Cue-Based Authentication for Virtual Reality
In AVI 2022: Proceedings of the 2022 International Conference on Advanced Visual Interfaces. April 30, 2022. Association for Computing Machinery, New York, NY, USA. (bib)

Existing virtual reality (VR) authentication schemes are either slow or prone to observation attacks. We propose CueVR, a cue-based authentication scheme that is resilient against observation attacks by design since vital cues are randomly generated and only visible to the user experiencing the VR environment. We investigate three different input modalities through an in-depth usability study (N=20) and show that while authentication using CueVR is slower than the less secure baseline, it is faster than existing observation resilient cue-based schemes and VR schemes (4.151 s â 7.025 s to enter a 4-digit PIN). Our results also indicate that using the controllersâ trackpad significantly outperforms input using mid-air gestures. We conclude by discussing how visual cues can enhance the security of VR authentication while maintaining high usability. Furthermore, we show how existing real-world authentication schemes combined with VRâs unique characteristics can advance future VR authentication procedures.