The modern Mixed Reality devices that make the Metaverse viable require vast information about the physical world and can also violate the privacy of unsuspecting or unwilling bystanders in their vicinity. In this article, we provide an introduction to the problem, existing solutions, and avenues for future research.

翻译：现代混合现实设备使得元宇宙成为可能，但需要大量关于物理世界的信息，同时也可能侵犯周围不知情或不愿参与的旁观者的隐私。本文介绍了该问题、现有解决方案及未来研究途径。