On the privacy-preserving HCI issues

Abstract

Actual interactions between human users and computers occur at the user interface, which includes both hardware and software. When users attempt to input sensitive information to computers, a kind of shoulder surfing that might use direct observation techniques, such as looking over someone's shoulder, to get the information could be a great concern at the user interface. In this paper, we observe privacy-related issues at the user interface and then present an abstract model for privacy-preserving human-computer interactions. In such an abstract model, we also present two prototype methods which could work with traditional input devices. © 2009 Springer Berlin Heidelberg.