Changing ownership of / is not a good idea. If you are placing private/secure data then the preferred way would be to use an encrypted filesystem that only you have the key for. You can create a folder say /home/user/<username>/ and change the ownership of that to whoever, however anything with root permissions can view anything within the filesystem. However An encrypted file system's out can only be veiwed in it's encrypted form without the private key and so encryption sounds like the way I would suggest.
So you could place it down as /home/user/<username>/private/ with the private directory being the root of the encrypted filesystem. However I could have misunderstood what you meant.
Last edited by r3sistance; 08-09-2009 at 08:08 AM.