Keep It Private or KIP is a Windows Service and a MCE Plugin that allows to keep any media (video and pictures) file private.
In order to access your private pictures or videos you can activate the plug in from the Windows Media Center Interface, it will ask for the parental code, if the parental code is correct then KIP will give you access to your private stuff. Once the MCE session is closed, KIP will secure the files again by deny access to them. KIP is very use full if you are sharing a Media Center Extender with your kids.
KIP also work with a non-MCE Windows Machines.