Internet technology has proven to be a vital contributor to many cutting-edge innovations that have given humans access to interact virtually with objects. Until now, numerous virtual systems had been developed for digital transformation to enable access to thousands of services and applications that range from virtual gaming to social networks. However, the majority of these systems lack to maintain consistency during interconnectivity and communication. To explore this discussion, in the recent past a new term, Metaverse has been introduced, which is the combination of meta and universe that describes a shared virtual environment, where a number of technologies, such as 4th and 5th generation technologies, VR, ML algorithms etc., work collectively to support each other for the sake of one objective, which is the virtual accessibility of objects via one network platform. With the development, integration, and virtualization of technologies, a lot of improvement in daily life applications is expected, but at the same time, there is a big challenge for the research community to secure this platform from external and external threats, because this technology is exposed to many cybersecurity attacks. Hence, it is imperative to systematically review and understand the taxonomy, applications, open security challenges, and future research directions of the emerging Metaverse technologies. In this paper, we have made useful efforts to present a comprehensive survey regarding Metaverse technology by taking into account the aforesaid parameters. Following this, in the initial phase, we explored the future of Metaverse in the presence of 4th and 5th generation technologies. Thereafter, we discussed the possible attacks to set a preface for the open security challenges. Based on that, we suggested potential research directions that could be beneficial to address these challenges cost-effectively.

翻译：互联网技术已被证明是众多前沿创新的关键推动者，使人类能够与虚拟对象进行交互。迄今为止，为了支持数字化转型，已开发出大量虚拟系统，可提供从虚拟游戏到社交网络等数千种服务和应用。然而，这些系统大多在互联互通与通信过程中缺乏一致性。针对这一问题，近年来引入了一个新术语——Metaverse（元宇宙），它由“meta”和“universe”组合而成，描述了一个共享的虚拟环境，其中多种技术（如第四代和第五代通信技术、VR、机器学习算法等）协同工作，共同实现一个目标：即通过单一网络平台实现对象的虚拟可访问性。随着技术的开发、集成与虚拟化，日常生活的各类应用有望得到显著改善；但与此同时，研究界也面临巨大挑战，即如何保护该平台免受外部和内部威胁，因为该技术暴露于多种网络安全攻击之下。因此，有必要系统地梳理并理解新兴元宇宙技术的分类、应用、开放性安全挑战及未来研究方向。本文围绕上述参数，对元宇宙技术进行了全面的综述。在此基础上，我们首先探讨了在第四代和第五代技术环境下元宇宙的未来发展。随后，我们讨论了可能遭受的攻击，为开放性安全挑战奠定基础。基于此，我们提出了潜在的研究方向，这些方向有助于以成本有效的方式应对上述挑战。