| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an encryption communication line restoration method which allows a virtual encryption communication line to be restored automatically, quickly in the case of disconnection of the virtual encryption communication line, to provide an encryption communications device, and an encryption communication system. <P>SOLUTION: An encryption communication line restoration method for automatically restoring a virtual encryption communication line at disconnection of the line comprise: an information storing step for storing information necessary for use of the virtual encryption communication line into terminals 1 and 2; an information registering step for registering the information with a management device 3; an information reading step for making at least one of terminals 1 and 2, in which information is unavailable, read the information from the management device 3, in which at least one piece of information stored in the terminal 1 and the information stored in the terminal 2 becomes unavailable, and the virtual encryption communication line is disconnected; and an encryption communication line restoring step for automatically restoring the virtual encryption communication line, by using the information read out from the management deice 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
