Blockchain: the future of the web?

Technologists are working to develop the next generation of the web - Web 3.0 - which is aimed at decentralising the web and perhaps more importantly eliminating expensive middlemen and giving users more control over their data. One potential solution is blockchain - the same technology which underpins cryptocurrencies like Bitcoin. Kathryn Ryan talks to Andreas Antonopoulos. An expert in blockchain who's in NZ as part of Techweek.