| 摘要 |
PURPOSE:To prevent the wiretap by providing a means which selects and registers the individual coding and decoding procedures through mutual communication for each remote side of communication. CONSTITUTION:When a system A has the privacy communication with a system B, both the name B and identification number ID-B of the system are supplied to a utility program UTL for privacy communication. The program UTL uses a coding subroutine ENCD1 to perform the coding procedure and carries out a wiring action to a control table 13-4 for privacy communication in a direct access memory 13 of the system A. Thus the system A completes the registration of the system B for communication. In the same way, the system B registers the system A of the remote side. Hereafter, the privacy communication system can be freely set and changed by means of the program UTL. |
