Does this have exactly the same problem as authenticating via UDID? Ie -- when you sell your old phone the new user can magically authenticate as you. http://

Does this have exactly the same problem as authenticating via UDID? Ie -- when you sell your old phone the new user can magically authenticate as you. http://www.theage.com.au/digital-life/consumer-security/fears-over-iphone-app-security-glitch-20120703-21ez6.html http://www.theage.com.au/digital-life/consumer-security/fear...