| 摘要 |
PURPOSE:To increase the security effect of information by enciphering a file from a file server and outputting it onto a LAN by means of an encipherment corresponding to a user to give a file access request. CONSTITUTION:When a file access packet from an arbitrary terminal on the LAN is inputted through a driver/receiver 105 and a communication control 104 to a receiving buffer 107, a CPU 108 confirms a file name. Next, a user identifier is known, and an access right to the file name is checked. When the check is passed, an enciphering key to be uniquely decided by the user ID is set to an enciphering key register 103. There, the CPU 108 starts a file transfer. The file is enciphered through an algorithm circuit 102, made into a packet by the communication control 104 and made to flow onto a LAN cable 106 by adding the address of the opposite party to it. |
