security control panel

hi 
i want use a good security in my control panel, but every code that i write create security for users .

if owner of site( persone that contorol panel is for him and he have username and password of host) know php, he can steal my control panel or change my code that it is not nice! 

what i do?

If you want to protect your PHP code, I suggest using ionCube PHPEncoder

http://www.ioncube. com?xp=XFRFBM

.I use the Pro version (for the
access control features) and it has worked VERY well. It is very
affordable and has a lot of useful features.