Establishing and sustaining Metaverse service necessitates an unprecedented scale of resources. This paper considers the deployment of Metaverse service in a cloud-edge resource architecture, which can satisfy the escalating demand for Metaverse service resources while ensuring both high bandwidth and low latency. We propose a novel mechanism, named Reliable and Secure Metaverse Service (RSMS), to ensure Metaverse service reliability and security without sacrificing performance. RSMS consists of two protocols: (1) One is a blockchain-based lightweight mutual authentication protocol concerning heterogeneous Metaverse service resource nodes (RNs) dynamically joining a Metaverse service resource pool while guaranteeing their trustworthiness, which guarantees the security of Metaverse service. (2) The other is a group authentication protocol used to form and maintain a stable and secure Metaverse service group composed by RNs, which ensures the reliability and enhances the security of Metaverse service. The reliability and security of Metaverse service under RSMS are thoroughly discussed, and informal and formal security analysis are conducted. Additionally, we study the impact of RSMS on Metaverse service throughput, demonstrating its lightweight feature.

翻译：建立和维持元宇宙服务需要前所未有的资源规模。本文考虑在云-边资源架构中部署元宇宙服务，该架构能够满足对元宇宙服务资源日益增长的需求，同时确保高带宽和低延迟。我们提出了一种名为可靠与安全元宇宙服务（RSMS）的新型机制，以在不牺牲性能的前提下保证元宇宙服务的可靠性和安全性。RSMS包含两个协议：（1）一个是基于区块链的轻量级双向认证协议，涉及异构元宇宙服务资源节点（RN）动态加入元宇宙服务资源池，同时保证其可信性，从而保障元宇宙服务的安全性；（2）另一个是组认证协议，用于形成并维护由RN组成的稳定且安全的元宇宙服务组，从而确保元宇宙服务的可靠性并增强其安全性。本文全面讨论了RSMS下元宇宙服务的可靠性与安全性，并进行了非正式和正式的安全分析。此外，我们研究了RSMS对元宇宙服务吞吐量的影响，证明了其轻量级特性。