Artificial intelligence will open the door to ever-more devastating attacks -- but the most effective ones may be the most subtle, Darktrace's Dave Palmer says. Imagine you've got a meeting with a client, and shortly before you leave, they send you over a confirmation and a map with directions to where you're planning to meet. It all looks normal -- but the entire message was actually written by a piece of smart malware mimicking the client's email mannerisms, with a virus attached to the map. It sounds pretty far out -- and it is, for now. But that's the direction that Dave Palmer, director of technology at cybersecurity firm Darktrace, thinks the arms race between hackers and security firms is heading.