When this variety of discrepancy is detected, the knowledge packet can be discarded, protecting the recipient’s system. After BKF file corruption, you can not use it to restore your knowledge. After the new mapped 5G NAS safety context is taken into use for the 3GPP access following a successful inter system change from S1 mode to N1 mode in 5GMM-Related mode and the UE is registered with the same PLMN over the 3GPP entry and non-3GPP entry: 1. if a native 5G NAS safety context is used on the non-3GPP entry and: 1. the UE is in 5GMM-IDLE mode over non-3GPP entry, then the AMF and the UE shall activate and take into use the 5G NAS safety context over the non-3GPP entry that is used on the 3GPP access as described in TS 33.501 after the AMF sends or the UE receives the REGISTRATION Settle for message respectively. If the 5G NAS security context in use on each accesses is a mapped context, the UE and AMF shall keep the native 5G NAS safety context over the non-3GPP access and make it a non-present native 5G NAS safety context. 2. the UE is in 5GMM-Related mode over non-3GPP entry, in order to activate the new 5G NAS security context over the non-3GPP access that has been activated for the 3GPP entry the AMF shall send the Safety MODE COMMAND message over the non-3GPP access as described in TS 33.501. The Security MODE COMMAND message shall embrace the same ngKSI to establish the new 5G NAS security context that was activated over the 3GPP entry.

This current 5G NAS security context will be of sort native or mapped, i.e. originating from a native 5G NAS security context or mapped 5G NAS safety context. When the UE working in single-registration mode in a network supporting N26 interface has a PDN connection for emergency bearer providers and has no current EPS security context, the AMF shall set 5G-IA0 and 5G-EA0 as the selected 5G NAS security algorithms in the S1 mode to N1 mode NAS clear container IE. When the UE operating in single-registration mode in a network supporting N26 interface receives the command to carry out inter-system change to N1 mode in 5GMM-Connected mode (see TS 38.331) and has a PDN connection for emergency bearer services, if 5G-IA0 and 5G-EA0 as the chosen 5G NAS safety algorithms are included in the S1 mode to N1 mode NAS clear container IE, the UE shall create a regionally generated K’AMF. Derive the 5G NAS keys (i.e.e. Moreover, the UE shall additionally derive the 5G NAS keys from the mapped Ok’AMF using the selected NAS algorithm identifiers included in the S1 mode to N1 mode NAS clear container IE and associate this mapped 5G NAS safety context with the ngKSI worth obtained.

Moreover, the UE shall set the ngKSI worth of the associated safety context to the KSI value acquired. The safety parameters for authentication, integrity protection and ciphering are tied together in a 5G NAS security context and recognized by a key set identifier (ngKSI). Word: The use of ciphering in a network is an operator option. Observe: The creation of the N1 mode to S1 mode NAS clear container. Word: In some specifications the term ciphering key sequence quantity is perhaps used as a substitute of the term key set identifier (KSI). 4. when a new mapped 5G NAS security context or 5G NAS safety context created using “null integrity protection algorithm” and “null ciphering algorithm” is taken into use throughout the inter-system change from S1 mode to N1 mode, the AMF and the UE shall not delete the previously current native 5G NAS safety context, if any. In this subclause, for the ease of description, it is assumed that ciphering is used, except explicitly indicated in any other case.

In order for the UE working in single-registration mode in a network supporting N26 interface to derive a mapped 5G NAS security context for an inter-system change from S1 mode to N1 mode in 5GMM-Connected mode, the AMF shall assemble a mapped 5G NAS security context from the EPS safety context received from the source MME as indicated in TS 33.501. The AMF shall select the 5G NAS safety algorithms. The 5G NAS security context which is indicated by an ngKSI might be taken into use to establish the safe exchange of NAS messages when a new N1 NAS signalling connection is established with out executing a new main authentication and key agreement process (see subclause 5.4.1) or when the AMF initiates a safety mode management procedure. 5GSM messages are security protected not directly by being piggybacked by the safety protected 5GMM messages (i.e. UL NAS TRANSPORT message and the DL NAS TRANSPORT message). Emus and koalas will also be reintroduced to the space which is one of seven feral-free areas that’s being or is already established in NSW Nationwide Parks. The goal AMF additionally consists of the ngKSI with the similar worth as the ngKSI at present being used with the UE, the message authentication code, and the chosen NAS algorithms in the Intra N1 mode NAS clear container IE.