Patent ID: 7613678

Claim:
A data transmission device, comprising: an address storing device for storing each user's addresses for receiving data; a user authentication device for authenticating a person as a specific user in response to an identification inputted by the person; an address searching device for searching a first address of the authenticated user for receiving data, and a second address of another user who approves of receiving data from the authenticated user; an address displaying device for displaying both of the addresses located by the address searching device when both of the first address of the authenticated user and the second address of the other user who approves of receiving data from the authenticated user are located by the address searching device, wherein when both of the first address of the authenticated user and the second address of the other user who approves of receiving data from the authenticated user are displayed, the address displaying unit displays the first address first, followed by the second address, each as candidates for transmission designation; an address-designating device for designating an address selected from among the first address and the second address by the authenticated user, as a transmission destination; and a transmitting device for transmitting the data to the transmission destination designated by the address designating device.