A branch of the US Treasury uses sophisticated financial tools to hit targets linked to hostile governments. This is the new global warzone, write Leah McGrath Goodman and Lynnley Browning.

A California engineer identified by Newsweek magazine as the creator of the digital currency, Bitcoin, “unconditionally” denied the report and has hired a lawyer to “clear his name”.

‘Newsweek’ says Satoshi Nakamoto is the creator of cyber currency bitcoin, but the cantankerous, obsessively private engineer has denied it. So is the magazine right, asks Dan Buckley