School deepfake ransoms

For many schools, it’s normal to post pictures of their own pupils online, either celebrating events or for marketing. But these photos could also be taken by criminals and used to make distressing deepfake AI images. We speak to the founder of a company which says it has a solution. Also on the programme, the incredible ways graphene can augment our senses – including to smell for diseases. And the student with dyslexia who invented his own tech to help him through his course.Presenter: Chris Vallance Producer: Imran Rahman-Jones(Image: A child places a metal pin impression toy over their face, so they cannot be identified. Credit: Getty Images)