An atomic-scale fingerprint could boost the security of connected devices, according to British scientists who have developed it. The tiny identity tags are essentially tiny imperfections in the building blocks of matter, making them virtually impossible to clone. They could be used as the basis of a robust system for authenticating hardware and software, Details of the work are published in the journal Scientific Reports. “What you do is shrink these systems down as far as they will go,” Dr Jonathan Roberts from Lancaster told BBC News.–BBC