This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
You can not hide anything in the address bar. There is a way to use frames to do it, but you would still have that initial link with the parameters in it. Any smart person would know how to get that link out of the frames anyway. If you really want security, I would rethink it on the server side and avoid using client side technology. Eric