Communications systems firewall
US8037520B2 · kind B2 · utility
1Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2006 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Sep 12, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0236
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus, programs and signals for providing communications network security. The approach is based on using established “standard” protocols, but packets (or cells or frames) are deliberately malformed by the sender, optionally according to a predetermined rule (for example by inverting a packet check digit). A filter forwards only packets identified as being invalid, optionally in accordance with the rule; packets which are valid with respect to the “standard” protocol are dropped. The filter is preferably implemented in hardware to mitigate the risk of its being compromised by a malicious attack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.