It's no surprise that hackers working for North Korea, Iran's mullahs, Vladimir V. Putin in Russia, and the People's Liberation Army of China have all learned that the great advantage of cyberweapons is that they are the opposite of a nuke: hard to detect, easy to deny, and increasingly finely targeted.

We have spent so much time worrying about a 'cyber Pearl Harbor,'' the attack that takes out the power grid, that we have focused far too little on the subtle manipulation of data that can mean that no election, medical record, or self-driving car can be truly trusted.

Cyberattacks have long been hard to stop because determining where they come from takes time - and sometimes the mystery is never solved.

David E. Sanger Quotes