Network monitor with a homodyne detector for early identification of network attacks
US12088617B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2022 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Sep 17, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1458
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system has a firewall ingress node carrying network traffic. An attack injector creates a network attack flow on the firewall ingress node and thereby forms with the network traffic a composite firewall input signal on the firewall ingress node. A firewall egress node carries a response signal corresponding to the composite firewall input signal. A network monitor is connected to the firewall ingress node and the firewall egress node. The network monitor includes a homodyne detector to multiply the response signal by an oscillating driver signal to form a product that is integrated over time to form a homodyne detector response signal that is larger when the homodyne detector response signal has some component with the same frequency as the oscillating driver signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.