Federal Reserve was hacked more than 50 times in the past five years

Cybersecurity reports reveal only a portion of all cyber-attacks on US central bank and identifies 51 cases of 'information disclosure' involving the Fed's board

The Federal Reserve detected more than 50 cyber breaches between 2011 and 2015, with several incidents described internally as "espionage", according to Fed records.

The US central bank's staff suspected hackers or spies in many of the incidents, the records show. The Fed's computer systems play a critical role in global banking and hold confidential information on discussions about monetary policy that drives financial markets.