How to identify a visitor based on their browser characteristics?
<p>I'm making a simple application where users can rate items.</p>

<p>I want to make the application very easy to use and would like to avoid a login, even if it means less accurate ratings.</p>

<p>I found this article on recognizing a user based on browser characteristics:
<a href="http://www.mediapost.com/publications/?fa=Articles.showArticle&amp;art_aid=128563" rel="nofollow">http://www.mediapost.com/publications/?fa=Articles.showArticle&amp;art_aid=128563</a></p>

<p>How can I implement something like that in JS/Node.js?</p>
