Question

We are offering a SaaS to website owners where we’ll provide the users with interesting offers and track their shopping. Its a rebate model service.

We will offer this service as an IFrame which the site owners will put on their websites.
However, I want the website’s original users to be logged into our iframe when they come in?

now, I know that IFrame will be a separate website and hence session is not shared but how would you share the user?

I really want to avoid double login.

1. Is the OpenID a good idea and does our problem lie under this domain?
2. What about Facebook connect (again OpenID).

Thank you

edit
Suppose the website has user login already. Can we continue their user’s previous logins?

Answer 1

alternatively to OpenID you could create your own Single Sign On Service