Windows:
On a network, one can login on any machine using the network login-id & password. A machine is generally specific to a user and it may contain personal & confidential folders too, which too can be accessed by any user who logs in to the machine. If a user is to make that data secure he would have to place it in his $User-area. ("C:\Documents & Settings\$user-area"). Files present in the $user-area have user based permissions.
Therefore, if we were to give permissions to the other folder (e.g. C:\abc\) we would have to move it to the $user-area.
The summary of the idea is - "If we just create a link (shortcut) of the C:\abc\ in the $user-area, then the C:\abc\ also acquires the user-specific-properties of $user-area and hence becomes a user-specific folder"
This invention allows flexibility by allowing users to just place shortcuts of the desired folders in the $user-area or other folders thus exercising the same control properties over linked folders too.
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