Abstract: A biometric authentication device includes: a receiver that receives an input of identification information of a person to authenticate; an image acquirer that acquires an image of a predetermined part of the person to authenticate from a camera; a guide display control that displays, on a display, a guiding shape and the image acquired by the image acquirer irrespective of whether the identification information received by the receiver is registered in a file containing registered identification information of persons; and an authenticator that authenticates the person based on the image acquired by the image acquirer. The guiding shape for position adjustment of the predetermined part with respect to the camera.

Abstract: By a user logging in to a web application system, a database is created on a database server 20 utilized through a web application server 10, data in the database is restored from backup data in a client terminal 30, operation logs for data entry, modification, and deletion by means of a web application are created in the client terminal 30, and upon logout, backup data of the database is saved from the database server 20 to the client terminal 30 before the database is deleted from the database server 20.