name: MBMS
full_form: Multimedia Broadcast/Multicast Service
context: R5a: The transfer of the MBMS keys between the MBMS key generator and the UE shall be confidentiality protected. R5b: The transfer of the MBMS keys between the MBMS key generator and the UE shall be integrity protected. R5c: The UE and MBMS key generator shall support the operator to perform re-keying as frequently as it believes necessary to ensure that: - users that have joined an MBMS User Service, but then left, shall not gain further access to the MBMS User Service without being charged appropriately - users joining an MBMS User Service shall not gain access to data from previous transmissions in the MBMS User Service without having been charged appropriately - the effect of subscribed users distributing decryption keys to non-subscribed users shall be controllable. R5d: Only authorized users that have joined an MBMS User Service shall be able to receive MBMS keys delivered from the MBMS key generator. R5e: The MBMS keys shall not allow the BM-SC to infer any information about
description: Multimedia Broadcast/Multicast Service (MBMS) is a telecommunications service that enables efficient delivery of multimedia content, such as video and audio, to multiple users over wireless networks. It supports both broadcast and multicast modes, allowing for the simultaneous transmission of content to multiple recipients.
explanation: The context describes MBMS as a service that provides specific functionalities like efficient multimedia content delivery and support for broadcast and multicast modes. This clearly defines it as a telecommunications service offering.
section_title: C.4	Requirements on MBMS Key Management
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biotag_Description: 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,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O