Using shared secret data (SSD) to authenticate between a CDMA network and a GSM network
First Claim
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1. A mobile station, comprising:
- means for receiving a random number (RAND) from a first network;
means for generating an encryption key using the received RAND; and
means for using the generated encryption key as both an encryption key and as an authentication key used in an algorithm to authenticate the mobile station, which is subscribed in the first network, to communicate using a second network.
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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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Citations
29 Claims
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1. A mobile station, comprising:
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means for receiving a random number (RAND) from a first network; means for generating an encryption key using the received RAND; and means for using the generated encryption key as both an encryption key and as an authentication key used in an algorithm to authenticate the mobile station, which is subscribed in the first network, to communicate using a second network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A processor-implemented method of authenticating a mobile station, comprising:
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receiving a random number (RAND) from a first network; generating, on the processor, an encryption key using the received RAND; and using the generated encryption key as both an encryption key and as an authentication key used in an algorithm to authentication the mobile station, which is subscribed in the first network, to communicate using a second network. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification