PROBLEM TO BE SOLVED: To provide a biological information authentication apparatus which appropriately determines changes of biological information due to a growth of a living body during biological information authentication and updates original authentication biological information.SOLUTION: In the biological information authentication apparatus 100, at least a biological information acquiring device 4 for obtaining biological information of an authentication object, a storing device 2 for storing authentication biological information, and a personal computer unit 1 having a biological information authentication program 11 for carrying out authentication using the biological information of the authentication object and the authentication biological information are connected in such a manner that communications are carried out freely. The biological information authentication program 11 contains a similarity calculation means 111 for calculating similarity between the biological information of the authentication object and authentication biological information, a similarity determination and authentication means 112 for carrying out authentication by determining whether the similarity meets a predetermined coincident condition, and an updating means 113 for updating the authentication biological information with the biological information of the authentication object when the similarity meets a predetermined replacement condition different from the coincident condition.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体情報認証に於いて、生体の成長による生体情報の変化を適切に判定して、照合用原本を更新できるようにした生体情報認証装置を提供する。【解決手段】少なくとも、認証対象生体情報を取得する生体情報採取装置4と、照合用生体情報を記録する記録装置2と、認証対象生体情報と照合用生体情報によって認証を行う生体情報認証プログラム11を備えたPC本体1とが通信自在に接続される生体情報認証装置100であって、生体情報認証プログラム11は、認証対象生体情報と照合用生体情報との類似度を算出する類似度算出手段111と、類似度が所定の一致条件を満たしているかを判定することによって認証を行う類似度判定認証手段112と、類似度が、前記一致条件とは異なる所定の入替条件を満たす場合に、照合用生体情報を前記認証対象生体情報で更新する更新手段113とを備える。【選択図】図1
