| 摘要 |
<p>In the present invention, a client device (100), on the basis of security levels which have been set for an application program and data retained in a server device (200), assesses allowability of access so as to perform authentication with the server device (200) by way of a challenge code generated using packet data from the application program. The server device (200), upon transmission of the challenge code, transmits a pre-set response code to the client device (100), whereupon if there is a set response to the same by the client device (100), access by the client device (100) is allowed.</p> |
