title: Email and Reusable Token URLs
body: <p>I'm building a site that offers functionality to users without requiring them to register. The idea is to send an email to the specified address containing a link with a token. That way the user would could this link anytime they want to make changes to the functionality.</p>
  
  <p>While I realize that there is no way to truly secure such a concept, I'm looking for options to minimize the visibility of the token. In its current state, soon as the user clicks on the link it is added to their browser history, available to anyone who has access to the computer.</p>
  
  <p>In most cases I would over come this with a simple form so that the token could be passed through with a POST request, but forms aren't really supported in emails.</p>
  
  <p>So the question is, does anyone know of an alternative way to hide a token in such an email?</p>