In the domain of Extended Reality (XR), particularly Virtual Reality (VR), extensive research has been devoted to harnessing this transformative technology in various real-world applications. However, a critical challenge that must be addressed before unleashing the full potential of XR in practical scenarios is to ensure robust security and safeguard user privacy. This paper presents a systematic survey of the utility of biometric characteristics applied in the XR environment. To this end, we present a comprehensive overview of the different types of biometric modalities used for authentication and representation of users in a virtual environment. We discuss different biometric vulnerability gateways in general XR systems for the first time in the literature along with taxonomy. A comprehensive discussion on generating and authenticating biometric-based photorealistic avatars in XR environments is presented with a stringent taxonomy. We also discuss the availability of different datasets that are widely employed in evaluating biometric authentication in XR environments together with performance evaluation metrics. Finally, we discuss the open challenges and potential future work that need to be addressed in the field of biometrics in XR.

本研究解决了在扩展现实（XR）中应用生物识别技术面临的安全和隐私问题。论文系统地调查了用于用户身份认证的生物识别特征，提出了生物识别脆弱性网关的分类，并详尽讨论了在XR环境中生成和认证生物识别虚拟化身的过程。研究的发现为提升XR安全性和用户隐私保护提供了重要参考，并指出了未来研究的开放挑战。

扩展现实中的生物识别技术：综述