  Metaverse is a living space and cyberspace that realizes the process of
virtualizing and digitizing the real world. It integrates a plethora of
existing technologies with the goal of being able to map the real world, even
beyond the real world. Metaverse has a bright future and is expected to have
many applications in various scenarios. The support of the Metaverse is based
on numerous related technologies becoming mature. Hence, there is no doubt that
the security risks of the development of the Metaverse may be more prominent
and more complex. We present some Metaverse-related technologies and some
potential security and privacy issues in the Metaverse. We present current
solutions for Metaverse security and privacy derived from these technologies.
In addition, we also raise some unresolved questions about the potential
Metaverse. To summarize, this survey provides an in-depth review of the
security and privacy issues raised by key technologies in Metaverse
applications. We hope that this survey will provide insightful research
directions and prospects for the Metaverse's development, particularly in terms
of security and privacy protection in the Metaverse.
