Dynamic detection of HTTP-based DDoS attacks using estimated cardinality
US11451563B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Jan 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1458
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer method and system for detecting a Denial of Service (DoS) attack by detecting changes in recent cardinality of a network traffic flow. Packet traffic flows are received from external device (networks), and a cardinality estimation is then performed on a received packet traffic flow. A series of cardinalities is maintained for prior packet traffic flows. Changes in cardinalities associated with prior packet traffic flows are detected when compared to cardinalities of a current packet traffic flow. An alert condition for the network traffic flow is generated regarding a suspected DoS attack based upon the detected changes in cardinalities regarding comparison of the cardinalities associated with prior packet traffic flows compared to cardinalities of a current packet traffic flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.