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In this article, the authors provide a comprehensive overview on three corepillars of metaverse-as-a-service (MaaS) platforms; privacy and security, edgecomputing, and blockchain technology. The article starts by investigatingsecurity aspects for the wireless access to the metaverse. Then it goes throughthe privacy and security issues inside the metaverse from data-centric,learning-centric, and human-centric points-of-view. The authors address privateand secure mechanisms for privatizing sensitive data attributes and securingmachine learning algorithms running in a distributed manner within themetaverse platforms. Novel visions and less-investigated methods are reviewedto help mobile network operators and metaverse service providers facilitate therealization of secure and private MaaS through different layers of themetaverse, ranging from the access layer to the social interactions amongclients. Later in the article, it has been explained how the paradigm of edgecomputing can strengthen different aspects of the metaverse. Along with that,the challenges of using edge computing in the metaverse have beencomprehensively investigated. Additionally, the paper has comprehensivelyinvestigated and analyzed 10 main challenges of MaaS platforms and thoroughlydiscussed how blockchain technology provides solutions for these constraints.At the final, future vision and directions, such as content-centric securityand zero-trust metaverse, some blockchain's unsolved challenges are alsodiscussed to bring further insights for the network designers in the metaverseera.

Unlocking Metaverse-as-a-Service The three pillars to watch: Privacy and Security, Edge Computing, and Blockchain