A system may include a first automated teller machine (ATM) and a second ATM, wherein the first ATM and the second ATM are in communication via a local area network. The first ATM obtains a user input value, generate an encryption key based on the user input value, and generates encrypted authentication information based on the encryption key. The first ATM also obtains a first biometric reading, updates a user record based on the first biometric reading, and stores the encrypted authentication information at the first ATM in association with the user record. The second ATM obtains a second biometric reading and a duplicate value, retrieves the encrypted authentication information associated with the user record based on the second biometric reading, generates a decryption key based on the duplicate value, and decrypts the encrypted authentication information to retrieve the authentication information.