A few hours after the Reuters reported the existence of a surveillance tool used by Yahoo for email massive scanning, the Tech giant denied it. Yahoo has replied to the Reuters saying that such kind of surveillance systems doesnt exists within the Yahoo architecture. The company was ordered by the US Foreign Intelligence Surveillance Court to scan users emails for digital signatures According to a New York Times, the company was also ordered by a judge to scan emails for malicious activity. The NSA chief, Admiral Michael Rogers, speaking at the Cambridge Cyber Summit yesterday, said the reports would be a bit speculative”]
Source: https://securityaffairs.co/wordpress/51963/intelligence/yahoo-surveillance-tool-2.html