[jonathankoren]

Now do it with random network jitter.

The main problem here is that even if you could do it, why would you? There are over 3.4 billion Internet users in the world. Given that people share IP addresses and even browsers, what's the actually gain identifying someone through typeahead search keystroke jitter? This would spend a lot of effort, and and then tell you what that a cookie doesn't?

I can't imagine that it's actually worth the effort.