EAP-AKA and EAP-SIM Parameters

Created

  • 2005-05-02

Last Updated

  • 2026-10-20

Note

All requests for value assignment from the various number spaces below require "Specification Required". Requests must be specified in sufficient detail so that interoperability between independent implementations is possible. Possible forms of documentation include, but are not limited to, RFCs, the products of another standards body (e.g. 3GPP), or permanently and readily available vendor design notes.

Available Formats

Subtypes

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
0 Reserved
1 AKA-Challenge RFC 4187; RFC 4186
2 AKA-Authentication-Reject RFC 4187; RFC 4186
3 Unassigned
4 AKA-Synchronization-Failure RFC 4187; RFC 4186
5 AKA-Identity RFC 4187; RFC 4186
6-9 Unassigned
10 SIM-Start RFC 4187; RFC 4186
11 SIM-Challenge RFC 4187; RFC 4186
12 AKA-Notification and SIM-Notification RFC 4187; RFC 4186
13 AKA-Reauthentication and SIM-Reauthentication RFC 4187; RFC 4186
14 AKA-Client-Error and SIM-Client-Error RFC 4187; RFC 4186
15-255 Unassigned RFC 4187

Attribute Types (Non-Skippable Attributes 0-127)

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
0 Reserved
1 AT_RAND RFC 4187; RFC 4186
2 AT_AUTN RFC 4187; RFC 4186
3 AT_RES RFC 4187; RFC 4186
4 AT_AUTS RFC 4187; RFC 4186
5 Unassigned
6 AT_PADDING RFC 4187; RFC 4186
7 AT_NONCE_MT RFC 4187; RFC 4186
8-9 Unassigned
10 AT_PERMANENT_ID_REQ RFC 4187; RFC 4186
11 AT_MAC RFC 4187; RFC 4186
12 AT_NOTIFICATION RFC 4187; RFC 4186
13 AT_ANY_ID_REQ RFC 4187; RFC 4186
14 AT_IDENTITY RFC 4187; RFC 4186
15 AT_VERSION_LIST RFC 4187; RFC 4186
16 AT_SELECTED_VERSION RFC 4187; RFC 4186
17 AT_FULLAUTH_ID_REQ RFC 4187; RFC 4186
18 Unassigned
19 AT_COUNTER RFC 4187; RFC 4186
20 AT_COUNTER_TOO_SMALL RFC 4187; RFC 4186
21 AT_NONCE_S RFC 4187; RFC 4186
22 AT_CLIENT_ERROR_CODE RFC 4187; RFC 4186
23 AT_KDF_INPUT RFC 9048
24 AT_KDF RFC 9048
25-127 Unassigned

Attribute Types (Skippable Attributes 128-255)

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
128 Unassigned
129 AT_IV RFC 4187; RFC 4186
130 AT_ENCR_DATA RFC 4187; RFC 4186
131 Unassigned
132 AT_NEXT_PSEUDONYM RFC 4187; RFC 4186
133 AT_NEXT_REAUTH_ID RFC 4187; RFC 4186
134 AT_CHECKCODE RFC 4187; RFC 4186
135 AT_RESULT_IND RFC 4187; RFC 4186
136 AT_BIDDING RFC 9048
137 AT_IPMS_IND 3GPP TS 24.302; Dongwook Kim
138 AT_IPMS_RES 3GPP TS 24.302; Dongwook Kim
139 AT_TRUST_IND 3GPP TS 24.302; Dongwook Kim
140 AT_SHORT_NAME_FOR_NETWORK 3GPP TS 24.302; Dongwook Kim
141 AT_FULL_NAME_FOR_NETWORK 3GPP TS 24.302; Dongwook Kim
142 AT_RQSI_IND 3GPP TS 24.139; Dongwook Kim
143 AT_ RQSI_RES 3GPP TS 24.139; Dongwook Kim
144 AT_TWAN_CONN_MODE 3GPP TS 24.302 12.6.0; Dongwook Kim
145 AT_VIRTUAL_NETWORK_ID RFC 7458
146 AT_VIRTUAL_NETWORK_REQ RFC 7458
147 AT_CONNECTIVITY_TYPE RFC 7458
148 AT_HANDOVER_INDICATION RFC 7458
149 AT_HANDOVER_SESSION_ID RFC 7458
150 AT_MN_SERIAL_ID RFC 7458
151 AT_DEVICE_IDENTITY 3GPP TS 24.302; Dongwook Kim
152 AT_PUB_ECDHE RFC 9678
153 AT_KDF_FS RFC 9678
154-255 Unassigned

AT_NOTIFICATION (12) Attribute - Notification Code Values

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
0 General failure after authentication RFC 4187; RFC 4186
1-1025 Unassigned RFC 4187
1026 User has been temporarily denied access RFC 4187; RFC 4186
1027-1030 Unassigned RFC 4187
1031 User has not subscribed to the requested service RFC 4187; RFC 4186
1032-16383 Unassigned RFC 4187
16384 General failure RFC 4187; RFC 4186
16385 Certificate Replacement Required WBA IMSI Privacy Protection for Wi-Fi - Technical Specification v1.0
16386-32767 Unassigned RFC 4187
32768 Success RFC 4187; RFC 4186
32769-65535 Unassigned RFC 4187

AT_VERSION_LIST (15) and AT_SELECTED_VERSION (16) Attributes - EAP method version numbers

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
0 Unassigned
1 EAP-SIM Version 1 RFC 4187; RFC 4186
2-65535 Unassigned RFC 4187

AT_CLIENT_ERROR_CODE (22) Attribute - Client Error Code Values

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 4187: Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement (EAP-AKA)

Available Formats

Value Description Reference
0 "unable to process packet": a general error code RFC 4187; RFC 4186
1 "unsupported version": the peer does not support any of the versions listed in AT_VERSION_LIST RFC 4187; RFC 4186
2 "insufficient number of challenges": the peer's policy requires more triplets than the server included in AT_RAND RFC 4187; RFC 4186
3 "RANDs are not fresh": the peer believes that the RAND challenges included in AT_RAND were not fresh RFC 4187; RFC 4186
4-65535 Unassigned RFC 4187

EAP-AKA' AT_KDF Key Derivation Function Values

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Vesa Lehtovirta

Reference

  • RFC 9048: Improved Extensible Authentication Protocol Method for 3GPP Mobile Network Authentication and Key Agreement (EAP-AKA')

Available Formats

Value Description Reference
0 Reserved RFC 9048
1 EAP-AKA' with CK'/IK' RFC 9048
2-65535 Unassigned

Trusted Non-3GPP Access EAP Parameters

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 Virt-Net-Req Type RFC 7458
2 Virt-Net-Req Sub type RFC 7458
3 Connectivity Type RFC 7458
4 Access Technology RFC 7458
5 Serial ID Type RFC 7458
6-127 Unassigned

Virt-Net-Req Type

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 Single PDN connection RFC 7458
2 Multiple PDN connection. Can request Non-Seamless Wi- Fi Offload or EPC connectivity (see the Connectivity Type attribute below) RFC 7458
3-127 Unassigned

Virt-Net-Req Sub Type

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 PDN Type: IPv4 RFC 7458
2 PDN Type: IPv6 RFC 7458
3 PDN Type: IPv4v6 RFC 7458
4-127 Unassigned

Connectivity Type

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 Non-Seamless WLAN Offload (NSWO) RFC 7458
2 EPC PDN connectivity RFC 7458
3-127 Unassigned

Access Technology

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 UTRAN RFC 7458
2 E-UTRAN RFC 7458
3-127 Unassigned

Serial ID Type

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jouni Korhonen

Reference

  • RFC 7458: Extensible Authentication Protocol (EAP) Attributes for Wi-Fi Integration with the Evolved Packet Core

Available Formats

Value Description Reference
0 Reserved RFC 7458
1 IMEI RFC 7458
2 IMEISV RFC 7458
3-127 Unassigned

EAP-AKA' AT_KDF_FS Key Derivation Function Values

Registration Procedure(s)

  • Specification Required

Expert(s)

  • Jari Arkko, Peter Yee

Reference

  • RFC 9678: Forward Secrecy Extension to the Improved Extensible Authentication Protocol Method for Authentication and Key Agreement (EAP-AKA' FS)

Available Formats

Value Description Reference
0 Reserved RFC 9678
1 EAP-AKA' with ECDHE and X25519 RFC 9678
2 EAP-AKA' with ECDHE and P-256 RFC 9678
3-65535 Unassigned

Contact Information

Name Contact URI Last Updated
Dongwook Kim info&3gpp.org 2026-10-20