A12 Authentication
Encyclopedia
A12 Authentication is a CHAP
-based mechanism used by a CDMA2000
Access Network (AN) to authenticate a 1xEV-DO Access Terminal (AT). 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
(AN-AAA). In order to support A12 authentication, matching A12 credentials (i.e., an A12 Network Address Identifier (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 A.S0008).
For information about A12 authentication in roaming, see CDG
Reference Document #136.
Challenge-handshake authentication protocol
In computing, the Challenge-Handshake Authentication Protocol authenticates a user or network host to an authenticating entity. That entity may be, for example, an Internet service provider. CHAP is specified in RFC 1994....
-based mechanism used by a CDMA2000
CDMA2000
CDMA2000 is a family of 3G mobile technology standards, which use CDMA channel access, to send voice, data, and signaling data between mobile phones and cell sites. The set of standards includes: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B...
Access Network (AN) to authenticate a 1xEV-DO Access Terminal (AT). 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 protocol
In computer security, AAA commonly stands for authentication, authorization and accounting.- Authentication :Authentication refers to the process where an entity's identity is authenticated, typically by providing evidence that it holds a specific digital identity such as an identifier and the...
(AN-AAA). In order to support A12 authentication, matching A12 credentials (i.e., an A12 Network Address Identifier (NAI
Nai
Nai may refer to:*Nai , a Barber caste in India* Nai language, a language of Papua New Guinea* Nai , an album by singer Anna Vissi*Nai , a wind instrument, also known as the Moldavian pan flute...
) 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
CDMA2000
CDMA2000 is a family of 3G mobile technology standards, which use CDMA channel access, to send voice, data, and signaling data between mobile phones and cell sites. The set of standards includes: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B...
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
Point-to-Point Protocol
In networking, the Point-to-Point Protocol is a data link protocol commonly used in establishing a direct connection between two networking nodes...
(PPP) session.
A12 authentication is defined in TIA-878 (3GPP2 A.S0008).
For information about A12 authentication in roaming, see CDG
CDG
CDG may refer to:* IATA code for Charles de Gaulle Airport, in Paris, France* Congenital disorder of glycosylation also known as "CDG Syndrome"* Costume Designers Guild...
Reference Document #136.