CASB (Cloud Access Security Broker)

CASB in context

Security controls in telecom span signaling firewalls (SS7/Diameter/GTP screening at the network edge), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both the packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36 and, in Europe, NIS2 sectoral rules.

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking and lawful-interception abuse. The common thread is that most attacks exploit the inherited trust model of legacy signaling. SS7 and Diameter were designed for a closed operator community that no longer exists.

To place CASB in the wider telecom-security picture, review MAC Filtering, EDR, HTTP/2 Security in 5G, IGW, Cipher Downgrade Attack and CSPM.

Related terms

• MAC Filtering
• EDR
• HTTP/2 Security in 5G
• IGW
• Cipher Downgrade Attack
• CSPM
• Fronthaul
• Mediation Device (Lawful Interception)

Related topic hubs

• 5G NEF Security Network Exposure Function security in the 5G core.
• Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.
• 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.

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.