IVR (Interactive Voice Response)

Interactive Voice Response systems let callers interact with a service by speaking commands or pressing DTMF keys. IVRs front contact centres, banking lines, and operator self-service. From a security perspective, poorly designed IVRs leak information through speech recognition errors and are a common target of social-engineering attacks against authentication.

Categories: Security ControlsThreats and AttacksEncryption and Cryptography

IVR 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 IVR in the wider telecom-security picture, review Slice Security, A5/2, AP, BGP Hijacking, Cipher Downgrade Attack and EDR.

Related terms

Related topic hubs

  • Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.

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