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...

2004-12-14

2011-11-22

Nguyen, David Q (Department: 2617)

Telecommunications

Radiotelephone system

Security or fraud prevention

C455S435100, C455S410000, C370S337000, C370S328000

Reexamination Certificate

active

08064880

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.

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