How to Prove Your Identity Online

Fin Brunton looks at two new technologies that could revolutionise the way we communicate online. The first is a technology called the blockchain, which allows people to share information without trusting each other. Fin says it can be used by poets who want to publish their work and not have others say they wrote it instead of them. He explains how this works in terms of creating a 'block chain' where all posts are linked together as if there was only one person involved.