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                        why do you want to know
                    
                
             
            
                Posted 11 March 2018 - 06:12 AM
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                7083 posts
                
                    
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                        Tasmania (AU)
                    
                
             
            
                Posted 11 March 2018 - 06:25 AM
                No method comes to mind, short of ensuring you never give your pocket computer to anyone who might do that.
If you must hand it over, then full disk encryption would prevent them from reading the file contents (though that's not simple to implement!).
There's nothing you can do to stop them from performing a full wipe so they can copy their own stuff on, though.