Parents who gave their child a Kidizoom smartwatch or a VTech InnoTab tablet may have exposed them to identity theft after Hong Kong-based VTech said hackers stole the personal information of more than 6m children.

Having discovered the virus that targetted Iran’s nuclear plants, Liam O’Murchu is one of the world’s top computer security experts, writes Noel Baker. Hacking is now a major industry, and tracking it carries its own risks.