Using shared secret data (SSD) to authenticate between a CDMA network and a GSM network
US8064880B2 · kind B2 · utility
1Cited by
23References
29Claims
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Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A general global gateway (GGG) uses shared secret data to authenticate between a CDMA network and a GSM network such that a mobile station having a subscription in a GSM network can roam into a CDMA network and be authenticated to use the CDMA network without having a complete ANSI-41 subscription. The goal of authenticating a GSM subscriber in an ANSI-41 network using GSM authentication credentials is achieved by substituting encryption key Kc as SSD-A in the standard ANSI-41 computation of AUTHR using a CAVE algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.