The Second Biggest Threat Source? The U.K.

Attacks from addresses based in the United Kingdom accounted for 4 percent of all attacks, compared to 5 percent in 2015. China was the source of the third-largest number of attacks – 3 percent - up from fourth position in 2015. The top five attack source countries – the U.S., U.K., China, France and Norway - accounted for 75 percent of all identified attacks in 2016. (The next three? Russia, Poland and Australia.)