To set a distribution area and to distribute data while using the Internet.

The data for distribution of a distribution server 20 are uploaded and a specified browser 5 is distributed and installed in a client 3 beforehand. When the client 3 adds information for indicating the location of a connection server 10 on the way or the like and sends the browser 5 to a start distribution server 20, the distribution server 20 judges the location information of the connection server 10 on the way, and in the case that it is included inside a distribution area, gives permission, links the client 3 to an authentication server 11 and distributes the data for the distribution after the execution of prescribed authentication. The data for the distribution are distributed in an encoded state and decoded and perused only by the specified browser 5.