| 摘要 |
A wireless LAN access point 5 is installed in a hot spot belonging to legal person contractor with a service provider, and a data terminal 3 of a user belonging to a legal person contractor in the hot spot receives data by accessing an internet network via the wireless LAN access point 5. When a data terminal 4 as client utilized by a visitor not belonging to any legal person contractor in the hot spot receives desired data by accessing the internet network via the wireless LAN access point, it is connected to a certification server via the internet network, and its connection to the internet network is allowed when and only when it meets a certification condition.
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