name: RID
full_form: Routing InDicator
context: by the AUSF. NOTE 1: The AUSF need not store any AKMA key material after delivery to the AAnF. NOTE 1a: When re-authentication runs, the AUSF generates a new A-KID, and a new KAKMA and sends the new generated A-KID and KAKMA to the AAnF. After receiving the new generated A-KID and KAKMA, the AAnF deletes the old A-KID and KAKMA and stores the new generated A-KID and KAKMA. 5) The AAnF sends the response to the AUSF using the Naanf_AKMA_AnchorKey_Register Response service operation. A-KID identifies the KAKMA key of the UE. A-KID shall be in NAI format as specified in clause 2.2 of IETF RFC 7542 [6], i.e. username@realm. The username part shall include the RID and the A-TID (AKMA Temporary UE Identifier), and the realm part shall include Home Network Identifier. The A-TID shall be derived from KAUSF as specified in Annex A.3. The AUSF shall use the RID received from the UDM as described in step 2 to derive A-KID. NOTE 2: The chance of A-TID collision is not zero but practically low as
description: The Routing Indicator (RID) is a parameter used in the derivation of the AKMA key after primary authentication. It is received by the AUSF from the UDM and utilized to derive the A-KID, which identifies the KAKMA key of the UE.
explanation: The RID is classified as a Parameter because it is an attribute used within the network operations for authentication and key derivation purposes.
section_title: 6.1	Deriving AKMA key after primary authentication
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