TAP (Telecommunications Analysis Service)

TAP, in lawful-interception literature, refers to a network tap or test access point used to copy traffic into monitoring infrastructure. The acronym is also the original Telocator Alphanumeric Protocol for paging systems, and one of several lawful-interception roles. Context determines which meaning applies.

Categories: Threats and AttacksProtocols and Standards

TAP in context

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.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how the specs interlock (for example 3GPP TS 33.501 with GSMA FS.34 for 5G SBA security), is essential for both design and audit work.

To place TAP in the wider telecom-security picture, review Mediation Device (Lawful Interception), Telnet, X2 (LI), X3 (LI), Attack Surface Mapping and Incident Response.

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