title: Access Authentication in CDMA networks
text: # Access Authentication in CDMA networks
  
  Access Authentication in CDMA networks for telecommunications and computing provide network access for a mobile device. Specific methods such as CAVE-based Authentication (IS-95/1xRTT), and A12 Authentication (1xEV-DO) are possible. The serving network provides the mobile device access authentication mechanism.
  
  The exact method employed depends upon the type of service being used:
  
  * 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
  
  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.
  
  