Lineup Photo-Based Authentication Using Social Networks Sarita - PowerPoint PPT Presentation

Lineup Photo-Based Authentication Using Social Networks Sarita Yardi, Nick Feamster, Amy Bruckman Georgia Institute of Technology {yardi,feamster,asb}@cc.gatech.edu Lineup WOSN  Aug 18, 2008

Lineup WOSN  Aug 18, 2008

Lineup WOSN  Aug 18, 2008

Problem: Access control Lineup WOSN  Aug 18, 2008

Our Approach: Lineup  User sets access control  Client requests authentication  System selects one or more photos  System generates a “solution”  System presents test to user  User identifies subjects in photo  User is authenticated Lineup WOSN  Aug 18, 2008

Key Idea #1: Captchas Lineup WOSN  Aug 18, 2008

Key Idea #3: Peer to Peer Authentication Lineup WOSN  Aug 18, 2008

Key Idea #3: Crowdsourcing Lineup WOSN  Aug 18, 2008

User embeds widget User sets privacy level Client requests access to site Lineup generates photo „test‟ Client solves „test‟ Access granted Lineup WOSN  Aug 18, 2008

Lineup high User embeds widget User sets privacy level low Client requests access to site Lineup generates photo „test‟ Client solves „test‟ Access granted Lineup WOSN  Aug 18, 2008

Lineup User embeds widget User sets privacy level Client requests access to site Lineup generates photo „test‟ Client solves „test‟ Access granted Lineup WOSN  Aug 18, 2008

Lineup User embeds widget User sets privacy level Client requests access to site Lineup generates photo „test‟ Client solves „test‟ Access granted Lineup WOSN  Aug 18, 2008

Lineup User embeds widget User sets privacy level Client requests access to site Lineup generates photo „test‟ Client solves „test‟ Access granted Lineup WOSN  Aug 18, 2008

Key Idea #4: Trust Lineup WOSN  Aug 18, 2008

Challenges: Security Lineup WOSN  Aug 18, 2008

Future Directions Lineup WOSN  Aug 18, 2008