CNA shares details about ransomware attack, recovery effort
CNA said it had restored email function and implemented new security measures.
Top insurer CNA disconnects systems after cyberattack
It could be a "nightmare scenario" for CNA and others if hackers get ahold of policyholder information.
GCHQ head says U.K. engaged in cyberwarfare against ISIS
GCHQ head Jeremy Fleming revealed that the U.K. has conducted a proactive cyber campaign against ISIS, touting the notion of using offensive cyberattacks to counter violent extremism.