PROBLEM TO BE SOLVED: To upgrade precision in authentication to be performed using biological information on a certain region which has bilateral symmetry.SOLUTION: The above object is accomplished by acquiring biological information from each of the left and right living body regions, that is, a pair of living body regions present in the left and right parts of a human body, producing collation feature data, which is employed in collation, from each of the left and right pieces of biological information, producing similarity feature data, which is employed in calculating the similarity between the left and right pieces of biological information, from each of the left and right pieces of biological information, comparing the collation feature data items with each other, calculating a similarity score representing the similarity between the left and right pieces of biological information, registering the left and right collation feature data items in association with the similarity scope in a registration database, comparing the left and right collation feature data items with left and right collation feature data items produced from biological information obtained at the time of authentication, calculating left and right collation scores, and using the left and right collation scores, the similarity score in the registration database, and the similarity score obtained by comparing the left and right similarity features, which are obtained at the time of authentication, with each other to decide whether authentication succeeds.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】 本発明の課題は、左右対称性のある部位の生体情報を用いた認証精度を向上させることを目的とする。【解決手段】 上記課題は、身体の左右に一対備わる生体部位の左右それぞれから生体情報を取得し、前記左右の生体情報のそれぞれから、照合に用いる照合特徴データを生成し、前記左右の生体情報のそれぞれから、該左右の生体情報の間の類似性算出に用いる類似性特徴データを生成し比較して前記左右の生体情報の類似性を示す類似性スコアを算出し、前記左右の照合特徴データと前記類似性スコアとを関連付て登録DBに登録し、前記左右の照合特徴データと、認証時の生体情報から生成した左右の照合特徴データとを比較して左右それぞれの照合スコアを算出し、前記左右それぞれの照合スコアと、前記登録DBの前記類似性スコアと、認証時の前記左右の類似性特徴を比較して得られた前記類似性スコアを用いて認証の成否を判定することにより
