name: PCK
full_form: Private Call Key
context: and authenticity of the payload. The pCK is encrypted to the user identity (UID) associated to the MCPTT UE. The UID used to encrypt the data will be derived from the terminating user's URI (e.g. user.002@mcptt.example.org) and a time-related parameter (e.g. the current year and month). The terminating user's URI is added to the recipient field (IDRr) of the message. The payload includes the encrypted PCK and the key identifier (PCK-ID). The PCK is unique within the MCPTT system. On creating the PCK, the initiator generates a 32-bit PCK Identifier (PCK-ID). The 4 most significant bits of the PCK-ID indicate the purpose of the PCK is to protect Private call communications, the other 28-bits are randomly generated. The payload is signed using (the KMS-provisioned key associated to) the identity of the initiating user. This identity is derived from the initiating user's URI (e.g. user.001@mcptt.example.org) and a time-related parameter (e.g. the current year and month). The initiating
description: The Private Call Key (PCK) is a unique identifier used to protect private call communications within the MCPTT system. It is encrypted to the user identity associated with the MCPTT UE and includes a key identifier (PCK-ID). The PCK-ID is a 32-bit value, where the 4 most significant bits indicate its purpose for protecting private calls, and the remaining 28 bits are randomly generated.
explanation: The context explicitly describes the Private Call Key as a unique identifier used to protect private call communications. This description aligns with the definition of a Parameter in the telecommunications domain, which includes critical network attributes such as identifiers and timers.
section_title: 7.5.1	General
biotag_Context: O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,B-Parameter,O,O,O,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,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,B-Parameter,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,B-Parameter,B-Parameter,O,O,O,O,O,O,O,O,B-Parameter,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,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,O,O,O,O
biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,B-Service,B-Device,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,O,O,O,O,O,O,O