Who Are You Now? Fading to Multiple Personas

1. MOTIVATION There is strong support for single sign-on, using methods such as Facebook, Google, or Amazon for providing thirdparty sign-on to websites [3]. While it is practical to the user, it carries a large risk: a compromise of the account credentials can lead to a severe impact on the websites the user authenticates to, and unwanted linkages between intentionally separated social roles, or personas. Moreover, we increasingly use mobile devices and theft of a device carrying credentials could have dire consequences, potentially based on different perceptions of risk [8]. Our perceptions of risk we may assign to each world we authenticate to may be different and very individual, and that separation may be indeed necessary, albeit cumbersome.