Monitoring apparatus
US11736506B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2021 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Sep 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/108
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A monitoring apparatus includes: an acquisition unit sequentially receiving messages on a network; a first calculation unit calculating a difference between data values of two continuous messages; a second calculation unit calculating a difference between reception time points of two continuous messages; a first determination unit determining whether a received message is an abnormal message based on the difference calculated by the first calculation unit or the second calculation unit; a second determination unit determining whether a received message is a suspicious message based on the difference calculated by the first calculation unit or the second calculation unit; and a recording unit recording, when the second determination unit determines that the received message is the suspicious message, as a history, data values and reception time points of the suspicious message and a predetermined number of messages received before and after reception of the suspicious message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.