Steve Mann, professor of electrical engineering and computer science at the University of Toronto and the "father of wearable computing," seen here in his closing keynote for the 2015 IAPP Canada Privacy Symposium, touches on wearables, "the natural world and the technological world, and how these two worlds intertwine," and "priveillance," a concept that he defines as "concealment and watching and the balance and interplay between concealment and sight."