Cyber attacks have created new dilemmas for philosophers who determine the ethics of war.
Sophisticated fake social media personas created by North Korean hackers offered to collaborate with cybersecurity researchers. Several US researchers fell for it.
A scholar of cyber conflict sets out why retaliation doesn't prevent future attacks, and explains what might have a better chance.
Cyberwarfare is more like cancer than bombs and bullets. Cybersecurity experts are just beginning to make their diagnosis of the Sunburst hack.