CCITT Standardizes SS7 (Signaling System No. 7)
CCITT standardized the SS7 protocol suite in 1988 across mobile and fixed networks, built on implicit operator trust with no authentication — the root cause of every later signaling attack.
01Video Presentation & Conference Keynote
02Deep-Dive Technical Analysis
SS7 was standardized assuming all participating operators were trusted state monopolies. The protocol lacks cryptographic signatures, origin validation, and message-level authentication: the powerful MAP/ISUP operations it defined — AnyTimeInterrogation, call forwarding, SMS routing, UpdateLocation — could be invoked by any signaling point worldwide. A single leaked Global Title could query any subscriber's location or redirect their messages.
03Vulnerability & Exploit Flow
Unauthenticated message injection across SIGTRAN/SS7 proxies.
04Recommended Defense & Mitigation Protocol
Deploy GSMA FS.11 / FS.19 Signaling Firewalls and SS7 SMS filtering.
05Security Impact & Geopolitical Consequence
Created the systemic flaws later weaponized for location tracking and SMS 2FA interception. Every SS7 attack disclosed between 2014 and 2024 traces back to this 1988 trust assumption.
06Authoritative Standards & External References
07Related Topic Cluster Records
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