name: GMK-ID
full_form: Group Master Key Identifier
context: associated parameters fails, the GMK is rejected. The Group Key Transport payload includes the Group User Key Identifier (GUK-ID) within the CSB-ID field. The GMK is unique within the MCPTT system and is identified by a GMK Identifier (GMK-ID) from which the GUK-ID is derived. On creating the GMK, the Group Manager generates a GMK-ID as follows. The 4 most significant bits of the GMK-ID is the 'purpose tag' which defines the purpose of the GMK. The 28 least significant bits of the GMK-ID is a 28-bit randomly-generated value. For each user, the GMS creates a 28-bit User Salt by hashing the user's MCPTT ID through a KDF using the GMK as the key as defined in clause F.1.3. The User Salt is xor'd with the 28 least-significant bits of the GMK-ID to create the 32-bit GUK-ID. The process for generating the GUK-ID is summarized in figure 7.3.1-3. Figure 7.3.1-3: Generating the GUK-ID The GUK-ID is placed in the CSB ID field within the header of the I_MESSAGE. NOTE: Knowledge of the GUK-ID,
description: The Group Master Key Identifier (GMK-ID) is a parameter used to identify a unique Group Master Key (GMK) in the MCPTT system. It consists of a 'purpose tag' and a randomly-generated value.
explanation: The text describes GMK-ID as an identifier for a specific Group Master Key within the MCPTT system, emphasizing its role as a network attribute used for identification. This aligns with the definition of a Parameter.
section_title: 7.3.1	General
biotag_Context: O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,B-Parameter,I-Parameter,I-Parameter,I-Parameter,O,O,O,B-Parameter,O,O,B-Parameter,O,O,O,O,B-Service,O,O,O,O,O,O,B-Parameter,B-Parameter,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,B-Service,B-Parameter,O,O,B-Protocol,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,B-Parameter,O,B-Parameter,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,B-Parameter,I-Parameter,I-Parameter,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O