Authentication method of computer program stored in medium

摘要

A client terminal device at a user side transmits a plurality of IDs in an arbitrary arrangement order to an authentication server machine on a network on the basis of a device environment of the user when a license authentication for software is performed. The authentication server machine performs the license authentication using an authentication program and ID issue program corresponding to the software for which the license authentication is applied, and issues an ID in the ID form corresponding to the software.