I know what you did in the lounge: invasion of privacy by the Free Food Cam

The goal of this study is to determine how the Free Food Cam whic h provides continuous pictures of the graduate student lounge in the School of Compute Science at Carnegie Mellon University Carnegie Mellon University can be used to invade the privacy of unsuspecting facult y, staff and graduate students caught in its crosshairs. In particular, we found several cases where t he webcam can determine how long a given person was in the lounge, on a coffee break, or reading the paper: if the person is a staff, this information is publicly available, including to their supervisor.