SIRT (Security Incident Response Team)

A Security Incident Response Team (also called CSIRT or CERT) is the group responsible for coordinating the detection, containment, eradication, and recovery from security incidents, plus the post-incident learning. Telecom SIRTs typically have direct relationships with national CERTs, GSMA T-ISAC, and law enforcement, and are engaged for both IT and signalling-layer incidents.

Categories: Security ControlsProtocols and StandardsInternet and Routing

SIRT in context

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.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place SIRT in the wider telecom-security picture, review SLH-DSA, Suricata, ML-DSA, IPv6, SHA and CSIRT: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

Related topic hubs

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.