公开(公告)号：US20240251266A1

公开(公告)日：2024-07-25

申请号：US18577415

申请日：2022-07-05

Applicant: NAGOYA INSTITUTE OF TECHNOLOGY

Inventor： Yoshihiro HASHIMOTO ,  Toshiaki HONDA

IPC: H04W24/08 ,  H04W12/03 ,  H04W12/04

CPC classification number: H04W24/08 ,  H04W12/03 ,  H04W12/04

Abstract: A monitoring system comprises a router unit and a monitoring unit. The router unit includes an acquisition unit obtaining a packet encrypted with a first encryption key by a first communication device and sent from the first communication device, the monitoring unit includes a decryption unit decrypting the packet obtained by the acquisition unit with a first decryption key corresponding to the first encryption key and a recording unit recording information based on the decrypted packet, the router unit includes a transfer unit transmitting the encrypted packet to a second communication device, the router unit and the monitoring unit function as OPC UA application integrated within encrypted communications, are equipped with OPC UA server/client functionalities, capable of OPC UA encryption/decryption, and make an inquiry to an OPC UA server as a proxy for an OPC UA client.