| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electronic certificate management system which avoids an impossibility of communication even if a data corruption occurs during communication of a new electronic certificate for update. <P>SOLUTION: A communication management device 11 and an IP line unit 63 are connected with a VPN 21 between center terminals, and an electronic certificate is used for authentication in a VPN connection. An account management server 41 of the communication management device 11 corresponds to a certificate management device, and transmits a new electronic certificate for update to a terminal device. The IP line unit 63 is a terminal device, a controller 101 thereof leaves the electronic certificate before update in a storing portion 103, and causes the storing portion to store a new electronic certificate received. The controller 101 instructs a communication connection using the new electronic certification to a communication connection portion 105. When the communication connection portion 105 fails in a communication connection, the controller 101 instructs the communication connection portion 105 the communication connection using the electronic certificate before update left in the storing portion 103. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
