User Authentication in blockchain-based voting systems employs multi-factor authentication (MFA) techniques to ensure that only authorized voters can access the voting platform. This feature combines various verification methods, such as something the user knows (password), something the user has (a mobile device or token), and something the user is (biometric verification). The purpose of this feature is to enhance security, protect voter identities, and maintain the integrity of the voting process by preventing unauthorized access and potential fraud.