An information processing apparatus comprising a chip implemented in the information processing apparatus to independently perform a predetermined process, the chip including: a storage unit configured to store user unique information in which a single piece of biometric information of a user and different pieces of unique information for use when a unique process corresponding to the user is performed are associated with each other, wherein the single piece of biometric information corresponds to one of a plurality of authenticating methods; and an information processing unit configured to: notify, during an initial registration process, information relating to safety of each of the different authenticating methods, information relating to identity rejection ratio of each of the different authenticating methods, and information relating to ratio of misidentification as another person of each of the different authenticating methods, so that the user selects one of the authenticating methods which is used for authentication, obtain the authenticating method and a first biometric information of the user, retrieve a second biometric information of the user which corresponds to the obtained authenticating method from the user unique information in the storage unit, when the first biometric information and the second biometric information match each other, obtain the different pieces of unique information corresponding to the second biometric information from the user unique information, and perform predetermined processes by using the different pieces of unique information. a storage unit configured to store user unique information in which a single piece of biometric information of a user and different pieces of unique information for use when a unique process corresponding to the user is performed are associated with each other, wherein the single piece of biometric information corresponds to one of a plurality of authenticating methods; and an information processing unit configured to: notify, during an initial registration process, information relating to safety of each of the different authenticating methods, information relating to identity rejection ratio of each of the different authenticating methods, and information relating to ratio of misidentification as another person of each of the different authenticating methods, so that the user selects one of the authenticating methods which is used for authentication, obtain the authenticating method and a first biometric information of the user, retrieve a second biometric information of the user which corresponds to the obtained authenticating method from the user unique information in the storage unit, when the first biometric information and the second biometric information match each other, obtain the different pieces of unique information corresponding to the second biometric information from the user unique information, and perform predetermined processes by using the different pieces of unique information. notify, during an initial registration process, information relating to safety of each of the different authenticating methods, information relating to identity rejection ratio of each of the different authenticating methods, and information relating to ratio of misidentification as another person of each of the different authenticating methods, so that the user selects one of the authenticating methods which is used for authentication, obtain the authenticating method and a first biometric information of the user, retrieve a second biometric information of the user which corresponds to the obtained authenticating method from the user unique information in the storage unit, when the first biometric information and the second biometric information match each other, obtain the different pieces of unique information corresponding to the second biometric information from the user unique information, and perform predetermined processes by using the different pieces of unique information.