| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a 1:N authentication system having high convenience and safety. <P>SOLUTION: An authentication client holds registered user ID and registered templates of biological information of at least one for every registered user and holds a score table, and includes at least one biological information input sensor and a feature value extraction function. An authentication server includes: a prior probability setting function; a 1:N fast matching function for sequentially matching the feature value with the registered templates of the registered users, and for discontinuing matching processing when the number of times of matching has exceeded a predetermined threshold; aΔscore calculation function for calculating aΔscore by using a score obtained by the 1:N fast matching and using the score table; a posterior probability calculation function for calculating posterior probabilities respectively of the registered users on the basis of the score and theΔscore; and an authentication object user identification function. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
