Question

Look at this situation:

1. www.websitea.com displays an img tag with a src attribute of www.websiteb.com/image.aspx?id=5 and style='display:none'
2. www.websiteb.com returns an clear image, in addition to a cookie with a name of referrer and value of 5 (created server-side from validated querystring.)

Would the cookie be created on domain www.websitea.com or www.websiteb.com?

Currently I’m sure a series of redirects with querystrings and to achieve cross-domain cookies, but I came up with this image idea a little ago. I guess I could also use an iframe.

Thanks!

Answer 1

Check out: cross-domain-user-tracking

Someone mentions using a 1×1 image for tracking across domains.