To improve the accuracy or reliability of information relating to a place or time where or when a user has taken a picture of an electronic diary.

For example, when a user takes a picture 102 to be added to the electronic diary 103 at the destination of a trip, the user acquires an authentication code from an authentication center device 300 (1) by using terminal equipment 200, and takes a picture 102 (2), and creates the picture 102 with the authentication code by adding the authentication code to the picture 102 (3), and stores it in an archive server device 400. Afterwards, the user inputs a text to an electronic journal 103 (4). Then, the user copies the picture 102 with the authentication code from the archive server device 400 to the electronic diary (5) by using an electronic journal management device 500, and links to a location time verification screen 104 from the picture 102 included in the electronic journal 103 (6), and stores the electronic diary 103 in an electronic diary ASP server 107 (7).