“At the same time, daily life relies more than ever on digital technology: more things run on software (fridges, cars, phones), those things have a greater array of sensors (GPS receivers and radio transmitters) and they are increasingly connected, often over the internet, allowing data, often embodying our most personal secrets, to flow to and fro. The paradox of the modern world is that, while we have more means to keep our data secret, there is so much more data to contend with and so many more places from where it can seep out into the world, where a sprawling ecosystem of private intelligence can collect, analyse and use it.”