name: DCR
full_form: Direct Communication Request
context: The 5G ProSe Remote UE integrity protects the DCR message using the code-receiving security parameters used for discovery. The integrity protection of the DCR message is performed after the privacy protection of UP-PRUK ID/CP-PRUK ID and RSC. The 5G ProSe UE-to-Network Relay, on receiving the DCR message, verifies the integrity of the received DCR message using the code-sending security parameters used for discovery. If the integrity verification of the DCR fails, the 5G ProSe UE-to-Network Relay shall abort the PC5 direct link establishment procedure. The 5G ProSe Remote UE shall integrity protect the DCR as follows: 1. If the UE is configured with DUIK, the DCR integrity key KINT is set to DUIK. Otherwise, the DCR message is not integrity protected, and steps 2-3 are skipped. 2. Calculate Message Integrity Check (MIC) using KINT, UTC-based counter and the DCR message as described in clause A.9. 3. Set the MIC IE to the calculated MIC. The 5G ProSe UE-to-Network Relay shall verify the
description: A Direct Communication Request (DCR) is a message used for integrity protection in the context of 5G ProSe Remote UE and UE-to-Network Relay communication. It involves calculating a Message Integrity Check (MIC) using a specific key, counter, and the DCR message itself to ensure the integrity of the communication.
explanation: The provided text explicitly refers to 'DCR message' as a means of communication for integrity protection, aligning with the definition of a Message as a unit of data exchanged between entities.
section_title: 6.3.5.3	Integrity protection of DCR
biotag_Context: O,B-Technology,B-Service,O,B-Device,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,B-Message,O,B-Parameter,O,O,O,B-Technology,B-Service,B-Interface,O,O,O,O,B-Message,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,B-Technology,B-Service,B-Interface,O,O,O,O,O,O,O,O,O,O,B-Technology,B-Service,O,B-Device,O,O,O,O,B-Message,O,O,O,O,O,B-Device,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,B-Organization,B-Message,O,O,O,O,O,B-Technology,B-Service,B-Interface,O,O,O,O
biotag_Description: O,B-Message,I-Message,I-Message,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,B-Service,O,B-Device,O,B-Interface,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O