AUTHENTICATION SYSTEM FOR PROVIDING BIOMETRICS-BASED LOGIN SERVICE

An authentication system for providing a biometrics-based login service, comprising: a biometrics authentication server; a target client; and a personal information authentication server, wherein a control method of the personal information authentication server in the authentication system comprises the steps of: checking, before a biometrics authentication process is performed, whether mutual trust exists between the personal information authentication server and the target client; obtaining, after it is determined that mutual trust exists between the personal information authentication server and the target client, biometrics for authentication from the target client; checking whether mutual trust exists between the personal information authentication server and the biometrics authentication server; providing, when it is determined that mutual trust exists between the personal information authentication server and the biometrics authentication server, the biometrics for authentication to the biometrics authentication server; obtaining a personal information protection key for unlocking protection of and decrypting personal information.