Communication network system, transmission node, reception node, and message checking method
US10681540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2015 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Jan 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/72
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a communication network system connected between a transmission node and a reception node, both the transmission node and the reception node store the same secret information with their secret information storage units. The transmission node includes a counter configured to increase its transmission count value by 1 for transmitting each message, wherein a MAC generator generates MAC based on secret information, transmission data, and its transmission count value, thus transmitting a message including transmission data and MAC. The reception node includes a counter configured to increase a reception count value by 1 for receiving each message, wherein a MAC checking part generates MAC based on secret information, reception data, and its reception count value, obtained from the received message, thus checking whether the generated MAC matches the MAC obtained from the received message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.