Crypto-Book: Privacy Preserving Online Identities

John Maheswaran,

David Isaac Wolinsky, Bryan Ford

Yale University

The Problem

Our Solution

privacy-preserving crypto layer

Personally identifiable social networking ID

Anonymized IDs – one pseudonym per site

privacy-preserving crypto layer

privacy-preserving crypto layer

Not linkable by Facebook or Crypto-Book

Not linkable by Facebook or Crypto-Book

• Assign public/private keypairs to Facebook accounts – Using split trust server cloud

• User generates anonymous signature (linkable ring signature) – To anonymously authenticate

with third party sites

• ID is anonymous and accountable

Architecture Summary

Thanks!

• More info:

• www.crypto-book.com

• Poster this afternoon

• Workshop paper to appear in HotNets’13

– Available on our website