you can go to
www.chasingame.com and get ideas of how to secure your camera. Also, what brand of camera do you have...that will help when people are responding to your post. I have a Moultrie camera and I secured it using a python lock and putting an eye-bolt through the door of the camera and then sealing. Works great. Remember, if the "thief" wants your camera bad enough, he will cut down the tree or bash the crap out of your camera.