Data from a whistleblower appears to show Saudi Arabia tracking the location of its citizens in the US by exploiting flaws in the SS7 phone network protocol (Stephanie Kirchgaessner/The Guardian)

Stephanie Kirchgaessner / The Guardian:
Data from a whistleblower appears to show Saudi Arabia tracking the location of its citizens in the US by exploiting flaws in the SS7 phone network protocol  —  Exclusive: Whistleblower's data suggests millions of tracking requests sent over four-month period