Sorry, there is no way to make something completely theft-proof. You can make things alot more difficult for a potential thief. I use a security box for all my cameras. These boxes lag-bolt to the tree with a 3.5in lagbolt and I also use a padlock and python cable. But if someone wanted it bad enough, I'm sure they would get it. All those precautions I use do, is keep an honest man honest.

Blessings.....Pastorjim