Millions of Australians will need new drivers licences and passports, after Optus’s lax data management exposed the details of around 10 million Australians to a hacker. Anthony Albanese has announced Optus should foot the bill for new ID documents and has called the hack a ‘wake up’ for corporate Australia. But why did Optus hold so much data on millions of Australians? Why wasn’t it held more safely? Today, associate professor Toby Murray from the School of Computing and Information Systems at the University of Melbourne - on how millions of Australians are now exposed – and what we need to do about it. Socials: Stay in touch with us on Twitter and Instagram. Guest: Associate professor, Toby Murray.