Abstract: A technique for user identification based on a user input. As to one aspect of the technique, a device (100) comprises a pattern generator (102), a user interface (104), and a transmitter (106). The pattern generator (102) is adapted to generate a pattern (Y0, Y1, . . . , Yn). The user interface (104) is adapted to correlate the pattern and the user input. The transmitter (106) is adapted to transmit a signal (X0, X1, . . . , Xm) indicative of a result of the correlation to a receiver (108).

Abstract: A device (100) for intrusion detection comprises a housing (102), a controller (230), and one or more foils (220; 240; 260a, 260b). The housing defines an interior (280; 282). The controller is located in the interior. Each of the one or more foils includes a surface sensitive to a local action at the sensitive surface. The one or more sensitive surfaces at least partially enclose a volume defined by the interior. Each of the one or more foils is coupled to the controller and configured to output a signal that depends on a location of the action at the respective sensitive surface.