To inhibit a minor from browsing detrimental images in an image file that a user downloaded from a home page.

This device is equipped with a memory 33 stored with image files read out of a server 19 and if an image in an image file is detrimental to a minor, a password addition part 37 adds a password for specifying the user of the image file to the image file and stores it in the memory 33. When the password is inputted from an operation part 11, a password collation part 39 collates the password inputted from the operation part 11 with the password added to the image file in the memory 33 when the image file is read out of the memory 33 and inhibits the image file from being read out when the passwords do not match each other.