The term "metaverse", a three-dimensional virtual universe similar to the real realm, has always been full of imagination since it was put forward in the 1990s. Recently, it is possible to realize the metaverse with the continuous emergence and progress of various technologies, and thus it has attracted extensive attention again. It may bring a lot of benefits to human society such as reducing discrimination, eliminating individual differences, and socializing. However, everything has security and privacy concerns, which is no exception for the metaverse. In this article, we firstly analyze the concept of the metaverse and propose that it is a super virtual-reality (VR) ecosystem compared with other VR technologies. Then, we carefully analyze and elaborate on possible security and privacy concerns from four perspectives: user information, communication, scenario, and goods, and immediately, the potential solutions are correspondingly put forward. Meanwhile, we propose the need to take advantage of the new buckets effect to comprehensively address security and privacy concerns from a philosophical perspective, which hopefully will bring some progress to the metaverse community.

翻译：“元宇宙”这一术语指的是类似于现实世界的三维虚拟宇宙，自20世纪90年代被提出以来一直充满想象力。近年来，随着各种技术的不断涌现和进步，元宇宙的实现成为可能，因而再次引起了广泛关注。它可能为人类社会带来诸多益处，例如减少歧视、消除个体差异以及促进社交等。然而，任何事物都存在安全与隐私问题，元宇宙也不例外。本文首先分析了元宇宙的概念，并指出与其他虚拟现实（VR）技术相比，它属于一种超级VR生态系统。随后，我们从用户信息、通信、场景和物品四个角度仔细分析和阐述了可能存在的安全与隐私问题，并相应提出了潜在的解决方案。同时，我们提出利用新木桶效应从哲学视角全面解决安全与隐私问题的必要性，希望这能为元宇宙社区带来一些进展。