Section: 9.11.3.12 Additional 5G security information
Content: The purpose of the Additional 5G security information information element is to provide the UE with additional security parameters (e.g. horizontal derivation parameter) or to request the UE to retransmit an initial NAS message during a security mode control procedure as defined in 3GPP TS 33.501[ Security architecture and procedures for 5G System ]  [24]. The UE uses these parameters for completion of security mode control procedure. The Additional 5G security information information element is coded as shown in figure 9.11.3.12.1 and table 9.11.3.12.1. The Additional 5G security information is a type 4 information element with a length of 3 octets. Figure 9.11.3.12.1: Additional 5G security information information element Table 9.11.3.12.1: Additional 5G security information information element