5G • Core Network
N32 Interface
N32 Inter-PLMN Roaming Interface
Secure interface connecting Security Edge Protection Proxies (SEPP) between different operator networks.
Technical Explanation
N32 provides secure, authenticated interconnect between carrier 5G Core networks. It is split into N32-c (control plane for PRINS security capability negotiation and key exchange) and N32-f (forwarding plane applying JSON Web Encryption and JSON Web Signature to protect roaming signaling messages).
Key Functions
- Connects Visited SEPP to Home SEPP across international carrier IPX networks
- Protects roaming SBI messages against eavesdropping and tampering
- Applies 3GPP PRINS (PRoxIty Network Security) application-layer encryption
Specifications
3GPP TS 29.573, TS 33.501
Interfaces
N32N32-cN32-f
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