TNGF (Trusted Non-3GPP Gateway Function)

In telecom networks, the TNGF is the 5G Network Function that enables trusted non-3GPP access (such as operator-controlled Wi-Fi) to attach to the 5G core, providing the equivalent of N3IWF for trusted networks while removing the need for an additional IPsec tunnel from the UE.

Categories: Core NetworkSecurity ControlsProtocols and Standards

TNGF in context

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

To place TNGF in the wider telecom-security picture, review AES, OpenSSL, N3IWF, EAP-AKA′, SEAF and N12 — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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