To provide a system capable of ensuring of enabling only a single user to use the same access key while keeping user's convenience.

A server 18 has a first communication control part 30 for controlling data communication through a radio telephone network, etc., between a first portable terminal 12 and an access key issuing part 36, and a second communication control part 32 for controlling data communication through a radio LAN network 22 between the access key issuing part 36 and a second portable terminal 26. The first communication control part 30 is configured to transmit data inherent to the second portable terminal 26 and data for requesting the access key issuing part 36 to distribute an access key for making the second portable terminal 26 accessible to the Internet to the second portable terminal 26. The second communication control part 32 is configured to distribute the issued access key to the second portable terminal 26 on the basis of the request.