With the commencement of work on the privacy aspects of big data in 2013, I found myself going back to a line of research and teaching I had thought of in the past tense. In terms of citations as recorded by Scholar.Google, a privacy piece from 1997 is still occupying 2nd place. So it was not too much of a stretch to respond to a request from the organizers of the 2013 Cyber Security Summit in Colombo on 25th June 2013. The overview piece is not that dependent on slides, so the slideset is quite small.