An anonymous reader writes "InformationWeek's Wolfe's Den reports that IBM has filed a dozen applications to patent a sophisticated airport security system which supports passive software-based profiling of potentially dangerous passengers off of pre-programmed rules. The setup uses a collection of sensors — video, motion, biometric and even olfactory — in terminals and around the airport perimeter, to supply raw data. 'These patents are built on the inference engine, which [analyzes sensor data and] has the ability to calculate very large data sets in real time,' says co-inventor Roger Angell. A small grid of networked computers delivers the necessary processing power. Two applications go one better than Israeli-style security, analyzing furtive glances to detect, according to the title of the patent application, 'Behavioral Deviations by Measuring Eye Movements,' as well as measuring respiratory patterns."