Authorization

Authorization 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 Authorization in the wider telecom-security picture, review SCP, 5G SBA, ACL, Inter-Network Function Authentication, OAuth2 in 5G Core and SBA Token Forgery: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

• SCP
• 5G SBA
• ACL
• Inter-Network Function Authentication
• OAuth2 in 5G Core
• SBA Token Forgery
• EAP-AKA′
• Core Network

Related topic hubs

• 5G NEF Security Network Exposure Function security in the 5G core.
• 5G Security 5G SBA, SEPP, SUCI, 5G-AKA, N32 and service-based interface security.
• 5G Penetration Testing Pentesting the 5G core, SBA, SEPP, and gNB interfaces.
• 5G Security Training Training on 5G core, SBA, N32, SUCI and radio security.

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.