Access Authentication
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Access Authentication in CDMA networks
a.k.a. CAVE-based Authentication (IS-95/1xRTT), A12 Authentication (1xEV-DO)
Authentication of a mobile device by the serving access network. The access authentication mechanism employed depends upon the type of service being used:
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- CAVE-based Authentication – Used for access authentication in CDMA/1xRTT
- AKA – 3G successor to CAVE-based authentication
- A12 Authentication – Used for access authentication in 1xEV-DO
Note that 1xEV-DO Hybrid MS/AT devices may employ both CAVE-based and A12 authentication since these devices connect to both the 1xRTT and 1xEV-DO networks.

