A12 Authentication
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{{more citations needed, date=March 2016 A12 Authentication (''Access Authentication'' for 1xEV-DO) is a CHAP-based mechanism used by a
CDMA2000 CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible ...
Access Network (AN) to authenticate a 1xEV-DO Access Terminal (AT). * Evolution-Data Optimized (''EV-DO'', ''EVDO'', etc.) is a
telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...
s standard for the
wireless Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most ...
transmission of data through
radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmit ...
signals, typically for
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. * In
computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes, and development of both hardware and software. Computing has scientific, e ...
, the Challenge-Handshake Authentication Protocol (''CHAP'') authenticates a user or network host to an authenticating entity. That entity may be, for example, an
Internet service provider An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet. ISPs can be organized in various forms, such as commercial, community-owned, non-profit, or otherwise private ...
. * ''CDMA2000'' is the core wireless air interface standard.


Description

A12 authentication occurs when an AT first attempts to access the AN and is repeated after some authentication timeout period. The element in the AN that performs this authentication is the Radio Network Controller (RNC) using its Access Network
AAA AAA, Triple A, or Triple-A is a three-letter initialism or abbreviation which may refer to: Airports * Anaa Airport in French Polynesia (IATA airport code AAA) * Logan County Airport (Illinois) (FAA airport code AAA) Arts, entertainment, and me ...
(AN-AAA). In order to support A12 authentication, matching A12 credentials (i.e., an A12
Network Address Identifier Network, networking and networked may refer to: Science and technology * Network theory, the study of graphs as a representation of relations between discrete objects * Network science, an academic field that studies complex networks Mathematics ...
(NAI) and A12 CHAP key) must be provisioned into the AT and the user's home AAA server. Since these credentials are only shared between the AT and its home AAA, the AN-AAA forwards A12 challenge responses received from an AT to its home AAA to determine whether they are correct. A12 authentication is separate from packet data authentication that may occur later when a data session is being established. A12 authentication is important for roaming since all participating operators in the IRT have agreed to support it. If A12 credentials are not provisioned into an AT, that AT will not be able to access any visited network that performs A12 authentication. In addition, the Mobile Node Identifier (MN ID) is obtained from the AN-AAA during successful A12 authentication. This MN ID is used by the AN on the A8/A9 and A10/A11 interfaces to enable handoffs of Packet Data Serving Node (PDSN) packet data sessions between ANs and between 1xEV-DO and 1xRTT systems. If A12 authentication is not performed, the MN ID must be somehow derived and such handoffs may not be possible without establishing a new Point-to-Point Protocol (PPP) session. A12 authentication is defined in TIA-878 (
3GPP2 The 3rd Generation Partnership Project 2 (3GPP2) is a collaboration between telecommunications associations to make a globally applicable third generation ( 3G) mobile phone system specification within the scope of the ITU's IMT-2000 project. In ...
A.S0008).


See also

*
List of authentication protocols A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby unio ...
*
List of CDMA2000 networks A list of CDMA2000 networks worldwide. Active networks Defunct networks See also * List of mobile network operators For a more comprehensive list of mobile phone operators, see Mobile country codes. Terrestrial This is a l ...
*
Mobile broadband Mobile broadband is the marketing term for Wireless broadband, wireless Internet access via mobile networks. Access to the network can be made through a portable modem, wireless modem, or a Tablet computer, tablet/smartphone (possibly Tetherin ...


References

*see CDG Reference Document #136. Code division multiple access