A biometric authentication method for authenticating a user by biometric information, comprising the steps of: in first equipment, obtaining biometric information of the user; extracting feature points for registration in the form of minutiae and feature point identification information for registration associated with the feature points and including relation radiations of the feature points, from the obtained biometric information; generating transformation parameters independently for the extracted feature points; mapping the generated transformation parameters to the respective feature point identification information; independently transforming the feature points by the transformation parameters to generate transformed feature points for registration; transmitting the transformed feature points for registration from the first equipment to second equipment, and storing the transformed feature points for registration into a memory of the second equipment; in the first equipment, obtaining biometric information for authentication; extracting feature points for authentication in the form of minutiae and feature point identification information for authentication associated with the feature points and including relation radiations of the feature points, from the obtained biometric information for authentication; comparing the relation radiations of the feature points included in the feature point identification information for authentication with the relation radiations of the feature points included in the feature point identification information for registration to search correspondence therebetween; mapping the transformation parameters to the respective feature points for authentication based on the correspondence, and independently transforming the feature points for authentication by the transformation parameters determined by the mapping to generate transformed feature points for authentication; transmitting the transformed feature points for authentication from the first equipment to the second equipment; and in the second equipment, verifying the received transformed feature points for authentication against the transformed feature points for registration stored in the memory, thereby to authenticate the user according to a verification result. in first equipment, obtaining biometric information of the user; extracting feature points for registration in the form of minutiae and feature point identification information for registration associated with the feature points and including relation radiations of the feature points, from the obtained biometric information; generating transformation parameters independently for the extracted feature points; mapping the generated transformation parameters to the respective feature point identification information; independently transforming the feature points by the transformation parameters to generate transformed feature points for registration; transmitting the transformed feature points for registration from the first equipment to second equipment, and storing the transformed feature points for registration into a memory of the second equipment; in the first equipment, obtaining biometric information for authentication; extracting feature points for authentication in the form of minutiae and feature point identification information for authentication associated with the feature points and including relation radiations of the feature points, from the obtained biometric information for authentication; comparing the relation radiations of the feature points included in the feature point identification information for authentication with the relation radiations of the feature points included in the feature point identification information for registration to search correspondence therebetween; mapping the transformation parameters to the respective feature points for authentication based on the correspondence, and independently transforming the feature points for authentication by the transformation parameters determined by the mapping to generate transformed feature points for authentication; transmitting the transformed feature points for authentication from the first equipment to the second equipment; and in the second equipment, verifying the received transformed feature points for authentication against the transformed feature points for registration stored in the memory, thereby to authenticate the user according to a verification result.