RFC 3310 (rfc3310) - Page 3 of 18
Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA)
Alternative Format: Original Text Document
RFC 3310 HTTP Digest Authentication Using AKA September 2002
This document specifies a mapping of AKA parameters onto HTTP Digest
authentication. In essence, this mapping enables the usage of AKA as
a one-time password generation mechanism for Digest authentication.
As the Session Initiation Protocol (SIP) [3] Authentication Framework
closely follows the HTTP Authentication Framework, Digest AKA is
directly applicable to SIP as well as any other embodiment of HTTP
Digest.
1.1 Terminology
This chapter explains the terminology used in this document.
AKA
Authentication and Key Agreement.
AuC
Authentication Center. The network element in mobile networks
that can authorize users either in GSM or in UMTS networks.
AUTN
Authentication Token. A 128 bit value generated by the AuC, which
together with the RAND parameter authenticates the server to the
client.
AUTS
Authentication Token. A 112 bit value generated by the client
upon experiencing an SQN synchronization failure.
CK
Cipher Key. An AKA session key for encryption.
IK
Integrity Key. An AKA session key for integrity check.
ISIM
IP Multimedia Services Identity Module.
PIN
Personal Identification Number. Commonly assigned passcodes for
use with automatic cash machines, smart cards, etc.
RAND
Random Challenge. Generated by the AuC using the SQN.
RES
Authentication Response. Generated by the ISIM.
Niemi, et. al. Informational