name: GMM
full_form: GPRS Mobility Management
context: detect potential bidding-down attacks which potentially could lead to an attacker to turn off the encryption. This solution proposes that integrity protection is supported in the LLC layer. Integrity protection is activated in the LLC layer by the GMM layer in the SGSN before the SGSN sends off the GMM Authentication and Ciphering Request message to the CIoT UE. Integrity protection is activated in the LLC layer by the GMM layer in the CIoT UE before the GMM layer in the CIoT UE sends off the GMM Authentication and Ciphering Response message to the SGSN. A problem was identified though that the CIoT UE does not have the integrity key and the network selected integrity algorithm available in the LLC layer when the CIoT UE receives the GMM Authentication and Ciphering Request message from the SGSN including the echoed algorithm identifiers and the network selected encryption and integrity algorithms. This implies that the LLC layer in the CIoT UE is not able to verify any Message
description: GPRS Mobility Management (GMM) is a protocol responsible for managing mobility and security aspects of user equipment (UE) in GPRS networks. It handles authentication, ciphering, and integrity protection, ensuring secure communication between the UE and the network.
explanation: The context describes GMM as a protocol that manages mobility and security within GPRS networks. It outlines specific functions like authentication, ciphering, and integrity protection, which are characteristic of protocols.
section_title: 6.1.3	Protection of algorithm negotiation
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