A single tap and the door is open. Smart devices make everyday life easier, but they also offer criminal opportunities. Researchers go up against hackers, trying to find security loopholes by cracking devices and networks - before hackers do. In the ongoing cat-and-mouse game, AI can be both a danger and a solution. Also: how digital images are changing our memories, how AI tutors is might one day give students tailored support, and how a musician took action against an AI-generated album that had been released under her name.