As craig.smikle has already pointed out at
http://blogs.msdn.com/b/b8/archive/2011/12/19/optimizing-picture-password-security.aspx#10250099 I think that Microsoft should consider giving at least
the option to disable the visual feedback of the picture password sing-in method.
This option could be especially useful when using the picture password sign-in method in a desktop or laptop using a mouse, that is when the screen is bigger and not partially hidden by the user fingers that are using the same method to sign-in to a windows
8 touchscreen device.
In the same blog Steven Sinofsky replied that "You can change to a text password (or a PIN) any time you want at time of logon" but I think that giving the option to disable the visual feedback of the picture password could, in any case, increase the picture
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