Parlar, Tuba2024-09-192024-09-1920232197-6503https://doi.org/10.1007/978-981-99-4641-9_8https://hdl.handle.net/20.500.12483/14579Metaverse is an abstract concept that transforms our physical world into a digital environment. As the Metaverse expands and gains widespread attention from users, privacy and security issues come to the forefront. An increase in the number of users means a large amount of personal data is being collected about users. Metaverse data includes biometric information, which consists of users’ physiological responses, facial expressions, voice tones, and vital characteristics. Artificial intelligence methods with biometric data raise concerns about data privacy and security. Limitations are required to be put on the type, amount of collected personal data, and how it will be shared with third parties. The use of wearable technologies also increases the effects of existing threats in the virtual world through new methods. Current security measures are insufficient for Metaverse applications. In this chapter, the threats and challenges faced in terms of data privacy and security in Metaverse applications are introduced, and methods developed as solutions to these fundamental problems are examined. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2023.eninfo:eu-repo/semantics/closedAccessBlockchainCybersecurityData privacyIdentity privacyMetaverseSecurityBook Chapter13312313310.1007/978-981-99-4641-9_82-s2.0-85175148313Q3