Cross-site communication - How its possible. Need a better Idea
<ol>
<li>A link will be provided for the WebSiteA to WebSiteB</li>
<li>We are not able to code anything in WebSiteA</li>
<li>I need to pass a token from WebSiteA to WebSiteB (In order to understand the user is coming from WebSiteA)</li>
<li>Can't use <code>Request.UrlReferrer</code> to identify previous site since WebSiteA is HTTPS</li>
<li>Query string is insecure because of replay attack (If any outside get the url it can be re-used)</li>
</ol>
