Using shared secret data (SSD) to authenticate between a...

Details Using shared secret data (SSD) to authenticate between a... Using shared secret data (SSD) to authenticate between a...

2007-04-17

2007-04-17

Cumming, William D. (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

Reexamination Certificate

active

10804267

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.

REFERENCES:
patent: 2004/0224666 (2004-11-01), Jain et al.
patent: 2004/0224667 (2004-11-01), Jain et al.
patent: 2005/0010692 (2005-01-01), Jain et al.

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