U.S. Sanctions Turn Iran’s Oil Industry Into Spy vs. Spy

Since President Trump imposed sanctions on Iranian oil sales last year, information on those sales has become a prized geopolitical weapon — coveted by Western intelligence agencies and top secret for Iran. And the business of selling Iranian oil, once a safe and lucrative enterprise for the well connected, has been transformed into a high-stakes global game of espionage and counterespionage. New York Times