name: MBSF-C
full_form: MBSF Control Plane
context: is derived when request is received from SMF. 12. AUSF responds to SMF with MUK. 13. (MB)-SMF distributes MUK to MBSF-C. 14. MBSF-C receives and stores the MUK. Afterwards, ACK is responded to SMF. 15. Continue with the multicast service initiation procedure. 16. MBSF-C checks whether the MBS security context for this multicast group is available. MBS security context, which is used for MBS traffic protection, includes the key_ID, K_group_enc, K_group_int, encryption and integrity algorithms. The key_ID is used to indicate which key pair is used. K_group_enc and K_group_int are used for encryption and integrity protection of MBS traffic respectively. If not, MBSF-C generates K_group and derives the K_group_enc and K_group_int. The encryption and integrity algorithms are selected. The MBS security context is distributed from MBSF-C to MBSF-U. 17. UE calculates token based on MUK and requests traffic key to MBSF-C. The token is secured with digital signatures or Message Authentication
description: The MBSF Control Plane (MBSF-C) is a network function responsible for managing the security context of multicast services in the 5G network. It handles key distribution, encryption, and integrity protection for MBS traffic.
explanation: MBSF-C is classified as a Network Function based on its role in controlling and managing the security aspects of multicast services within the network.
section_title: 6.2.2	Solution details
biotag_Context: O,O,O,O,O,O,O,O,O,B-Network Function,O,O,B-Network Function,O,O,O,O,O,B-Parameter,O,O,O,B-Network Function,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,B-Service,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,B-Network Function,O,O,O,B-Device,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,B-Service,O