VRSafe: A Secure Virtual Keyboard to Mitigate Keystroke Inference in Virtual Reality

Fuente: arXiv
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Auteurs principaux: Yuan, Yijun, Du, Na, Lee, Adam J., Palanisamy, Balaji
Format: Preprint
Publié: 2026
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author Yuan, Yijun
Du, Na
Lee, Adam J.
Palanisamy, Balaji
author_facet Yuan, Yijun
Du, Na
Lee, Adam J.
Palanisamy, Balaji
contents Password-based authentication is one of the most commonly used methods for verifying user identities, and its widespread usage continues in virtual reality (VR) applications. As a result, various forms of attacks on password-based authentication in traditional environments such as keystroke inference and shoulder surfing, are still effective in VR applications. While keystroke inference attacks on virtual keyboards have been studied extensively, few efforts have developed an effective and cost-efficient defense strategy to mitigate keystroke inferences in VR. To address this gap, this paper presents a novel QWERTY keyboard called \textit{VRSafe} that is resilient to keystroke inference attacks. The proposed keyboard carefully introduces false positive keystrokes into the information collected by attackers during the typing process, making the inference of the original password difficult. \textit{VRSafe} also incorporates a novel malicious login detector that can effectively identify unauthorized login attempts using credentials inferred from keystroke inference attacks with high detection rate and minimal time and memory cost. The proposed design is evaluated through both simulation experiments and a real-world user study, and the results show that \textit{VRSafe} can significantly reduce the accuracy of keystroke inference attacks while incurring a modest overhead from a usability standpoint.
format Preprint
id arxiv_https___arxiv_org_abs_2604_21001
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle VRSafe: A Secure Virtual Keyboard to Mitigate Keystroke Inference in Virtual Reality
Yuan, Yijun
Du, Na
Lee, Adam J.
Palanisamy, Balaji
Cryptography and Security
Password-based authentication is one of the most commonly used methods for verifying user identities, and its widespread usage continues in virtual reality (VR) applications. As a result, various forms of attacks on password-based authentication in traditional environments such as keystroke inference and shoulder surfing, are still effective in VR applications. While keystroke inference attacks on virtual keyboards have been studied extensively, few efforts have developed an effective and cost-efficient defense strategy to mitigate keystroke inferences in VR. To address this gap, this paper presents a novel QWERTY keyboard called \textit{VRSafe} that is resilient to keystroke inference attacks. The proposed keyboard carefully introduces false positive keystrokes into the information collected by attackers during the typing process, making the inference of the original password difficult. \textit{VRSafe} also incorporates a novel malicious login detector that can effectively identify unauthorized login attempts using credentials inferred from keystroke inference attacks with high detection rate and minimal time and memory cost. The proposed design is evaluated through both simulation experiments and a real-world user study, and the results show that \textit{VRSafe} can significantly reduce the accuracy of keystroke inference attacks while incurring a modest overhead from a usability standpoint.
title VRSafe: A Secure Virtual Keyboard to Mitigate Keystroke Inference in Virtual Reality
topic Cryptography and Security
url https://arxiv.org/abs/2604.21001