Summary Box: Report on global cyberattack

THE REPORT: A computer security firm says cybercriminals have spent at least the past five years targeting more than 70 government entities, nonprofit groups and corporations around the world to steal troves of data.

WHAT’S MISSING: The firm, McAfee Inc., did not say who may be behind the attacks but says the culprit is likely a nation state. McAfee is not naming most of the victims, nor is it stating exactly what data were stolen.

THE BACKDROP: The report comes amid a surge in high-profile hacking cases in recent months. Citigroup, Sony Corp., Lockheed Martin, PBS and others have been targeted by hackers.