A secured device including a security hardware module and a method thereof are provided. The secured device generates first user authentication information based on a user input, generates encryption key generation information corresponding to the first user authentication information, receives second user authentication information from an electronic device, and transmits to the electronic device the encryption key generation information corresponding to the first user authentication information when the second user authentication information matches the first user authentication information. The first user authentication information and the encryption key generation information are secured by the security hardware module.