The point is that common/casual attacks (on your computer, network, smartphone, home network) can be prevented by all of us. The second point is that targeted attacks – that is if you have digital assets worth stealing or compromising – are extremely difficult and expensive to prevent. But there are early warning and post attack tools that will help you minimize the damage – usually.
And if you are Home Depot of Target or Sony, you already have discovered – the hard way – the essence of this post.
Thanks to Anton Chuvakin and InfoSec Island