Close relationship between physical space and internal knowledge representations has received ample support in the literature. For example, location of visually perceived information in vertical space has been shown to affect different numerical judgments. In addition, physical dimensions, such as weight or font size, were shown to affect judgments of learning (JOLs, an estimation of the likeli...

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Graphical passwords are an alternative to text passwords, with advantages to both usability and security. We investigate PassTiles, a research graphical password system, and look specifically at user-chosen PassTiles passwords. We examine whether having a blank background or a background image affects patterns and hot-spots. We found reduced entropy in both conditions due to patterns, which wea...

We propose a protocol for secure communication between two parties who know each other well using only the entropy from their shared life experience. This could enable, for example, lovers or close friends to communicate over a one-way channel without prior key exchange. Our system uses a flexible secret-sharing mechanism to accommodate pieces of personal knowledge of variable entropy and memor...

We propose a protocol for secure communication between two parties who know each other well using only the entropy from their shared life experience. This could enable, for example, lovers or close friends to communicate over a one-way channel without prior key exchange. Our system uses a flexible secret-sharing mechanism to accommodate pieces of personal knowledge of variable entropy and memor...

The similarity structure of faces has long been recognized as an important mediator of face recognition. Distinctive faces have an enduring quality to them, such that they are rarely confused with other faces. At the same time, we often encounter a situation in which a particular face looks familiar, yet the individual may only bear a resemblance to several acquaintances. The veracity of these ...