The digital world is changing fast; the computing power of today’s smartphones outpaces that of supercomputers from just twenty-five years ago. We can video-call people on the opposite side of the globe, and we trust that our data are transmitted securely from one device to another. But, given this breathless speed of advancement, can we maintain our security in the coming decades? The use of quantum mechanics could be the answer. Is the UK’s science policy up to it?