name: KID
full_form: Key IDentifier
context: a request for the subscription data to the UDM/UDR. 3. The UE authorization information is included in the response message. If the security protection provided by PLMN is needed and MTK and KID is available, the UDM/UDR replies with the stored MTK and KID. Step 4-7 are skipped if key updated is not needed. 4. If MTK and KID is not available in UDM/UDR or the MTK needs to be updated based on local policy, (MB-)SMF generates a MTK and the associated key identifier (KID) for the MBS application. KID contains the Key Group part and the Key Number part. Key Group part could be the MBS Session ID. Key number part is used to distinguish MTKs that have the same Key Group part. If MBSF-C is determined to generate MTK and KID, (MB-)SMF retrieves MTK and KID from MBSF-C when needed. 5. (MB-)SMF provisions the generated MTK and the KID to the MBSF-U. 6. (MB-)SMF provisions the generated MTK and the KID to the UDM/UDR. 7. If UE is authorised to use the MBS feature and allowed to access the data
description: A Key Identifier (KID) is a parameter used in conjunction with a Master Key (MTK) for security protection in the context of Multimedia Broadcast/Multicast Service (MBS). It contains two parts: the Key Group part and the Key Number part, which are used to distinguish between different keys.
explanation: The KID is classified as a Security Parameter because it plays a crucial role in securing data transmission within the MBS framework. By uniquely identifying specific keys associated with an MTK, the KID enables controlled access and protects multimedia content from unauthorized use.
section_title: 6.8.2	Solution details
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biotag_Description: O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,I-Service,I-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O