SS7 and Diameter Attacks: How Signaling Flaws Expose Your Phone

SS7 and Diameter signaling attacks can track, intercept, and impersonate you. Here’s how they work and how to stop them.

Your phone can be tracked, your SMS two-factor codes can be intercepted, and your number can be impersonated, all without malware, a phishing link, or any access to your device. 

The attacks happen inside the telecom network, in the carrier-to-carrier control protocols known as signaling, the automated descendants of the old telephone switchboard. Most users never see them, and most carriers can’t reliably stop them.