Network monitoring device and computer program product
US10326782B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 22, 2017 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | May 23, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network monitoring device according to an embodiment monitors a message that is periodically transmitted in a network in which a message identified by an identifier is transmitted and received, and includes a reception time recording unit and an unauthorized-transmission determination unit. The reception time recording unit records a reception time in association with the identifier, every time a message to be monitored is received. The unauthorized-transmission determination unit determines presence of an unauthorized transmission on the received message to be to be monitored, based on a latest reception time Ti, an m previous reception time Ti-m, a message transmission period F, and a constant σ determined in advance, in a period from the reception time Ti-m to the reception time Ti, every time the message to be monitored is received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.