Current standard PIN entry systems for mobile devices are not safe to shoulder surfing. In this paper, we present VibraInput, a two-step PIN entry system based on the combination of vibration and visual information for mobile devices. This system only uses four vibration patterns, with which users enter a digit by two distinct selections. We believe that this design secures PIN entry, and allows users to easily remember and recognize the patterns. Moreover, it can be implemented on current off-the-shelf mobile devices. We designed two kinds of prototypes of VibraInput. The experiment shows that the mean failure rate is 4.0%; moreover, the system shows good security properties.

The computer mouse has been used for more than 40 years; users, however, can only perform simple actions. To solve this problem, we present "Sinkpad", an augmented mouse pad that has a malleable surface consisted of an elastic material. Sinkpad augments mouse functionality by allowing the user to sink the mouse into the pad and tilt the mouse on the pad. In addition, the pad provides the user with haptic feedback via the mouse. Moreover, the user can use Sinkpad as a conventional mouse pad because the pad serves as a flat surface unless the user sinks the mouse. Sinkpad allows the user to perform interesting techniques: sink, tilt, and sink+move. We also present three example applications to explore the possibilities of our techniques using the pad.We have presented Sinkpad, a mouse pad that has a malleable surface consisted of an elastic material. The

Users often connect two mobile devices at close range to transfer files such as pictures and movies from one device to another. In this paper, we present HoverLink, a new form of joint interactions on two mobile touchscreen devices such as smartphones and tablets using hover sensing capability. HoverLink allows users to connect two devices, manipulate the data on the devices, and disconnect them in a simple and continuous manner. We also describe HoverLink's applications: transferring data, and a menu interface.

Figure 1: HandyScope allows users to point and manipulate the remote area using a widget. a) When users put two fingers, and drag their finger to cross the segment between the two fingers, then b) HandyScope is activated. The widget is composed of two parts, a scope and a handler. The scope is displayed on the ray between the midpoint of the two fingers; the handler is displayed around the finger. The scope is sent to remote areas to select an area to be manipulated; the handler is used to manipulate the remote area by users. AbstractA large multi-touch tabletop has remote areas that the users might not reach by their hands. This forces users to walk around the tabletop. In this video, we present a novel remote control technique which we call HandyScope. This technique allows users to manipulate those remote areas. Moreover, users can transfer an object between the nearby area and the remote areas using a widget. In addition, users use pull-out, our own bimanual multi-touch gesture, both to invoke HandyScope, and to determine appropriate control-display ratio to point remote areas. This gesture allows multiple users to simultaneously manipulate remote areas without conflicting with other touch gestures.

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