Automatic cookie single sign on on multiple domains - like google

Question

I don\'t understand how google achieve the following mechanism of single sign on:

1. I login in gmail for example (I suppose this creates a cookie withmy authorizatio

Answer 1

Check this out.. http://www.codeproject.com/Articles/106439/Single-Sign-On-SSO-for-cross-domain-ASP-NET-applic. The article consist explanation and sample of SSO cross domain.