Mitigating denial-of-service attacks using frequency domain techniques
US7190671B2 · kind B2 · utility
8Cited by
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12Claims
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Key dates
| Filing date | Aug 21, 2002 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Sep 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1458
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for mitigating denial of service attacks in a communications network are described. Frequency domain techniques such as Fourier Transform are used to detect packet flooding in which a frequency spectrum reveals a periodic pattern to the attack packets. A pulse generator is used to create pulses having the frequency and phase of the periodic pattern. New packets arriving simultaneously with the created pulses are dropped from the system and packets which are not synchronized with the pulse generator are passed through the system normally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.