Method and apparatus for fast secure session establishment on half-duplex point-to-point voice cellular network channels
US7747021B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 18, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Mar 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for secure communication techniques in a communication system. The system can include a first device which communicates with a second device over a channel. A security association can be established during a first session between the devices via an asymmetric key exchange. The security association comprises a Traffic Encryption Key (TEK) and a first state vector. The TEK comprises a shared, secret symmetric key. The security association is stored in each of the devices for use during a second session between the devices to expedite security association establishment during call set-up of the second session. The security association can be associated with the second device in the first device, and with the first device in the second device. An updated state vector can be generated at the first device. A second session can be established between the first device and the second device by using the TEKs from the first session and the updated state vector. The security association can be used to encrypt voice packets being sent from the first device to the second device. The security association and updated state vector can then be used to decrypt the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.