Abstract or Summary:
Augmented-reality glasses like Google Glass present a new set of user-interface trade-offs which must be carefully considered in crafting user authentication protocols. First, it lacks a keyboard or touchscreen; second, the most prominent input mechanisms, voice recognition and a swipe sensor, are both easily observable by bystanders and thus are not suitable for password entry. Fortunately, these devices offer a private display that cannot easily be viewed by bystanders, and which helps in constructing secure user authentication. In this position paper we will outline problems and possible solutions for authentication on augmented-reality glasses.