| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform communication which firmly prevents unauthorized use of an address to enhance confidentiality. <P>SOLUTION: A conversion data generation part 21 generates conversion data which can be converted to a terminating-side actual address being an actual address of a terminating-side client terminal 10b only by a local server, from an originating-side actual address being an actual address of an originating-side client terminal 10a, which is included in a registered messages, and prescribed information and transmits the conversion data to the originating-side client terminal 10a. A session control part 22 receives a first session establishment request message and obtains the terminating-side actual address from conversion data and the originating-side actual address which are included in the first session establishment request message, and transmits a second session establishment request message to the terminating-side actual address, whereby session establishment between the originating-side client terminal 10a and the terminating-side client terminal 10b is controlled without directly using the originating-side actual address and the terminating-side actual address which are unequivocally assigned in a network 2. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
