1. Click to edit Master title style Jonas Lindstrøm, Alexandra Institute Privacy-preserving attribute- based credentials

2. Click to edit Master title style Motivation Shop User Issuer Trust 1: Age > 18 ?

3. Click to edit Master title style Solutions with online issuer Issuer e.g. OpenID, Facebook Connect, SAML: 3: Authenticate 2: Age > 18 ? 1: Age > 18 ? 4: Age = 30 User Shop Jonas Lindstrøm Age = 30

4. Click to edit Master title style Solutions with offline issuer e.g. X.509 v3 certificates: Shop Jonas Lindstrøm Age = 30 0: User Jonas Lindstrøm Age = 30 2: Issuer 1: Age > 18 ?

5. Click to edit Master title style Privacy ABCs Privacy-preserving Attribute-based-credentials (Privacy ABCs): Shop User Age > 18 2: Issuer 1: Age > 18 ? Jonas Lindstrøm Age = 30 0: Untraceability – Unlinkability – Minimal disclosure

6. Click to edit Master title style Existing implementations

7. Click to edit Master title style Existing implementations ABC4Trust pilot projects: –School forum in Söderhamn School –Course evaluation at Patras University Alexandra Instituttet A/S - Om os

8. Click to edit Master title style Untraceability, unlinkability and minimal disclosure. Put users in charge of their own information. Applicable in many use cases. Software libraries are available. Key points Alexandra Instituttet A/S - Om os

9. Click to edit Master title style Thank you!