We evaluate two decades of proposals to replace text passwords for general-purpose user
authentication on the web using a broad set of twenty-five usability, deployability and …

US8346217B2 - Systems, methods and apparatus for controlling access to mobile devices -
Google Patents US8346217B2 - Systems, methods and apparatus for controlling access to mobile …

Security questions (or challenge questions) are commonly used to authenticate users who
have lost their passwords. We examined the password retrieval mechanisms for a number of …

All four of the most popular webmail providers-AOL, Google, Microsoft, and Yahoo!-rely on
personal questions as the secondary authentication secrets used to reset account …

We examine the first large real-world data set on personal knowledge question's security
and memorability from their deployment at Google. Our analysis confirms that secret …

An understanding of embodiments described in this dis closure and many of the attendant
advantages may be readily obtained by reference to the following detailed description when …

Challenge questions are an increasingly important part of mainstream authentication
solutions, yet there are few published studies concerning their usability or security. This …

Backup authentication mechanisms help users who have forgotten their passwords regain
access to their accounts-or at least try. Today's systems fall short in meeting both security …

Many experimental performance evaluations depend on accurate measurements of the cost
of executing a piece of code. Often these measurements are conducted using infrastructures …

We present Selections, a new cryptographic voting protocol that is end-to-end verifiable and
suitable for Internet voting. After a one-time in-person registration, voters can cast ballots in …