1. A biometrics authentication method in which a client terminal transforms a feature for authentication extracted from biometric information of an individual with the help of a transform parameter to obtain a transformed feature for authentication and transmits it to an authentication server, the authentication server includes a database adapted to store a plurality of transformed features for registration and information specifying the individual by making the correspondence between them and searches said database to specify an individual corresponding to a transformed feature for registration which is the most similar to the transformed feature for authentication, said client terminal stores in a database on the client side in advance dummy features on the basis in which the feature for registration and the feature for authentication of the biometric information are classified into any of a plurality of groups, an index for identifying the group and transform parameters corresponding to the respective dummy features; and said authentication server includes a database for transformed features for registration adapted to store the transformed feature registration transformed from the feature for registration with the help of the transform parameter and information for identifying the individual from which extraction of the feature for registration originates while classifying them into any of said plural groups on the basis of said index, wherein, during a process for registration of the biometric information, said biometrics authentication method comprises in said client terminal the steps of: extracting a feature for registration from biometric information acquired from an individual; searching said database on the client side to specify one dummy feature for registration similar to the feature for registration; transforming the feature for registration by using a transform parameter corresponding to the specified dummy feature for registration and preparing transformed feature for registration; and transmitting to said authentication server the transformed feature for registration, an index for registration adapted to specify a group of the specified dummy feature for registration and information for specifying the individual from which extraction of the feature for registration originates, said biometrics authentication method comprises in said said authentication server the step of: registering, at a group corresponding to said index for registration in said database for transformed feature for registration, the received transformed feature for registration an information specifying the individual while making the correspondence between them.