Meredith Whittaker turned her back on Google, but she never left tech entirely. The former AI whistleblower is now the CEO of Signal, a messaging app that keeps conversations encrypted – used by journalists, whistleblowers, drug dealers, militants and others who want to keep communications secure.

Today, CEO of the Signal Foundation Meredith Whittaker, ahead of her public appearance at The Wheeler Centre in Melbourne, on the tech giants who hold our future in their hands.