The MI5 made "substantial contributions" to an investigation into one of the largest data breach in US history. Four people, including two Russian spies, have been charged over the hack at Yahoo. The US Justice Department says the hack targeted around 500 million account in 2014. Share Radio's James Brydges spoke to Dr Simon Moores, an information security analyst.

Guests: James Brydges,Dr Simon Moores

Published: Thu 16 March 2017