User talk:Hfastedge/EfficientAds

Looking for the most elegant way to both serve my ads to a client's site, and then verify their identity when they use my service.

1. Serve ad via javascript to client site (www.client.com), and serve a uid inside a form, and a form itself:

2. Client will get the UID, then send another userId back to me. The combination of UID and userid will prove their identity to me.