Get unique, static id from a device via web request

Question

I have an MVC application that I would like to add some custom stats to. For some of the stats, it would be nice to have a unique identifier for a device.

For examp

Answer 1

There is no identifier that's provided by a browser, privacy concerns make it very unlikely that any vendor would ever implement that, now at least.

The only option you have is some form of cookie.

For RSS feeds, you could conceivably embed a random unique ID in the feed URL every time its rendered, so you'd know when the person that retrieved that URL downloaded your feed. However, if the user shared that URL with others you'd have no real way of knowing.