PayPal faces three main barriers to adopting OpenID: 1) Their developer API currently has multiple APIs and SDKs, creating a steep learning curve; 2) Onboarding relying parties is challenging due to interoperability issues and the need for certification; 3) Security is a concern, specifically session swapping and the need for independent security evaluations.

1. Overcoming barriers to PayPal adoption of OpenIDAshish JainProduct Manager, PayPalOpenID Technology Summit, April 2010

2. Developer API

3. RP On boarding

4. SecurityDEVELOPER API Is this a valid PayPal user?

5. SSO + Attributes

6. SSO + Richer Attribute set

7. Data sharing (user not present)DEVELOPER API Common SDK / Library