Ferdous, Md SadekHossain, Mohammed ShakibHawak, Khawaja Ehsun UlJawad, Mutasin2025-07-092025-07-0920252025-06ID 21301307ID 21301284ID 21301435http://hdl.handle.net/10361/26460Cataloged from PDF version of thesis.Includes bibliographical references (pages 79-81).This thesis is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Computer Science and Engineering, 2025.The rapid growth of consumer-grade augmented reality (AR) and virtual reality (VR) devices has driven the interest in Metaverses, a type of fully immersive vir- tual world where people may communicate and conduct their businesses. However, similar to any restricted online services, the authentication of users is a crucial com- ponent to access any Metaverses. The authentication mechanism in the traditional online services has a number of issues such as password vulnerabilities, centralized control, identity fragmentation, session hijacking, scalability challenges, credential theft etc. Adopting such an authentication mechanism would introduce similar is- sues in the Metaverse domain. Moreover, there are also questions about additional security concerns in Metaverses as it is hard to control an individual’s virtual ac- tions. Hence, Blockchain create a decentralize environment that empowers users to take charge of their individual actions and identities. A smart contract that tokenize identity in the Metaverse can be executed securely within the blockchain technology. Therefore, a new authentication mechanism must be explored in order to increase the security of Metaverses. In this research, We propose a system utilizing the concept of Metaverse Federation in order to provide authentication throughout var- ious Metaverse, where multiple Metaverse will form a Circle of Trust (CoT) and the federation facilitates a secured authentication and identity management using a shared registry table for each Metaverse. This system leverages smart contracts and blockchain technology to generate Non-fungible token(NFT’s), which allow users to authenticate in various Metaverse. This enables users to navigate multiple Meta- verses with ease and a trusted identity, while complying with the specific rules and regulations of each Metaverse. we aim to explore a novel authentication mechanism tailored for Metaverses that will utilize the concept Non-fungible tokens (NFT’s) and the Metaverse Federation.81 pagesenBRAC University theses reports are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.MetaverseBlockChainSmart contractTokenNon-fungible token (NFT)Federated identityAuthenticationBlockchains (Databases).NFTs (Tokens).Thesis