CC (LI) (Content of Communication)

Also known as: Content of Communication

Content of Communication is the payload component of a lawful intercept: actual voice, SMS text, VoLTE/VoNR media or user-plane traffic of a target. CC is delivered over the ETSI X3 interface with correlation identifiers matching IRI, and its interception requires stricter legal authorisation than IRI in most jurisdictions.

Categories: Radio Access NetworkThreats and AttacksProtocols and Standards

CC (LI) in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking. The common thread is that most attacks exploit the inherited trust model of legacy signaling protocols.

To place CC (LI) in the wider telecom-security picture, review ETSI, Incident Response, Modulation, OT, RTSP and Telnet — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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