Provided is an apparatus for managing user authentication in a blockchain network and the apparatus comprises a processor configured to transmit, to a server, a request for a snapshot identifier (ID) with user data comprising at least one of one-time password, biometric data, context data, routine data, or device metadata, receive the snapshot ID generated based on the user data, initiate a transaction with the snapshot ID in the blockchain network comprising a blockchain server which authenticates the snapshot ID, and output blockchain transaction data associated with the transaction based on the authentication of the snapshot ID.