Modern society is rapidly becoming fully digitalized. This has many benefits, but unfortunately, it also means that personal privacy is threatened. The threat does not so much come from a 1984 style Big Brother but rather from a set of smaller big brothers. These small big brothers are companies that we interact with - public services and institutions - and that we invite to our private data.

Privacy as a subject can be problematic as it is a personal freedom. In this book, we do not take a political stand on personal privacy and what level of personal freedom and privacy is the...