Section: 9.11.3.54 UE security capability
Content: The UE security capability information element is used by the UE and by the network to indicate which security algorithms are supported by the UE in N1 mode for NAS security as well as which security algorithms are supported over NR and E-UTRA connected to 5GCN for AS security. The UE security capability information element is coded as shown in figure 9.11.3.54.1 and table 9.11.3.54.1. The UE security capability is a type 4 information element with a minimum length of 4 octets and a maximum length of 10 octets. Octets 5 to 10 are optional. If octet 5 is included, then also octet 6 shall be included. If the UE does not support any security algorithm for AS security over E-UTRA connected to 5GCN, it shall not include octets 5 and 6. The UE shall not include octets 7 to 10. If the UE does not support any security algorithm for AS security over E-UTRA connected to 5GCN, and if the network includes octets 7 to 10, then the network shall also include octets 5 to 6. If the network includes octet 7, then it shall include also octet 8. If the network includes octet 9, then it shall include also octet 10. Figure 9.11.3.54.1: UE security capability information element Table 9.11.3.54.1: UE security capability information element