Two of Europe's powerhouse economies are expected to push for tougher controls to stamp out terrorist financing this month in reaction to a spate of attacks on the continent. In a letter sent to the European Commission last month, German Finance Minister Wolfgang Schauble and French Finance Minister Michel Sapin called on the economic bloc to streamline related data-sharing among member-states, increase scrutiny on financial flows linked to high-risk jurisdictions and allow for the freezing of terrorist assets within the EU. The two nations also asked the EU to toughen controls on virtual currencies and other payment instruments that can...