How much do you know about what others might know about you, from your use of technology? How do you minimise your online footprint on things you'd rather keep private?
Bruce Schneier is a US technology and security expert, whose latest book is Data and Goliath: The Hidden Battles to Collect Your Data and Control Your World, talks to Kathryn Ryan about how much information is being gathered by governments and corporations through our use of phones and computers.
Pictured: Bruce Bruce Schneier. Photo: Rama (CC BY-SA 2.0 FR)