Security protocol processing for anti-replay protection
US8438641B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2010 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Aug 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1466
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Described embodiments provide a network processor that includes a security protocol processor to prevent replay attacks on the network processor. A memory stores security associations for anti-replay operations. A pre-fetch module retrieves an anti-replay window corresponding to a data stream of the network processor. The anti-replay window has a range of sequence numbers. When the network processor receives a data packet, the security hardware accelerator determines a value of the received sequence number with respect to minimum and maximum values of a sequence number range of the anti-replay window. Depending on the value, the data packet is either received or accepted. The anti-replay window might be updated to reflect the receipt of the most recent data packet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.