Photo-based authentication using social networks

  title={Photo-based authentication using social networks},
  author={Sarita Yardi Schoenebeck and Nick Feamster and Amy Bruckman},
We present Lineup, a system that uses the social network graph in Facebook and auxiliary information (e.g., "tagged" user photos) to build a photo-based Web site authentication framework. Lineup's underlying mechanism leverages the concept of CAPTCHAs, programs that are designed to distinguish bots from human users. Lineup extends this functionality to help a Web site ascertain a user's identity or membership in a certain group (e.g., an interest group, invitees to a certain event) in order to… CONTINUE READING
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