October 12, 2007 lecture by Paul Dourish for the Stanford University Human-Computer Interaction Seminar (CS 547). Mobility is no longer sufficient; location-tracking is a key feature. However, the introduction of location-based technologies has traditionally been accompanied by a series of concerns over privacy. These discussions, though, adopt a fairly reductive model of privacy, concerned primarily with the trade-offs involved in service provision and location disclosure. CS 547 | Human-Computer Interaction Seminar: http://hci.stanford.edu/seminar/ Stanford HCI Group: http://hci.stanford.edu/ Stanford Center for Professional Development: http://scpd.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanforduniversity/