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 3G, A5/1, Digital Signature, IPv6, OSPF and SHA — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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