Distributed network security system deploying guard tables
US8549581B1 · kind B1 · utility
22Cited by
5References
22Claims
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Key dates
| Filing date | May 28, 2008 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Jan 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0209
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Guard tables including absence information are used in a security system to limit the processing of negative queries. A key corresponding to a request to access a network resource is hashed and the output of the hash is a bit position in a guard table. The bit value at the bit position in the guard table is checked to determine if the information to which the key corresponds is absent from a datastore. Further processing of the request can be based on the indicated presence or absence information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.