The Red Cross has disclosed that it was the victim of a cyber attack and has asked the hackers who broke into the IT network of one of its contractors not to leak the personal information of more than 515,000 of "highly vulnerable people."

While they wrestle with the immediate danger posed by hackers today, US government officials are preparing for another, longer-term threat: attackers who are collecting sensitive, encrypted data now in the hope that they'll be able to unlock it at some point in the future.