The Primos Truth Cam 35 would not be the best choice as a security camera. Someone intruding on your property would activate the camera once he or she came within forty feet of the camera, but that same person would probably notice the camera. The Truth Cam 35 is bulky and, although Primos does manufacture cameras in camouflage colors, it would likely be seen and recognized by an intruder.
Whe set to take still photographs, the camera produces a faint but audible click. At night, it might use flash photography, which would certainly be noted by an intruder. Whenever the camera is activated by the movement or body heat of a human being or animal, a small red light comes on. Animals notice it, so it might be assumed that people will too.
The camera is encased in rugged plastic and is capable of withstanding severe weather conditions. With an optional metal protective case, the Truth Cam 35 will withstand repeated attacks by a black bear, which I have noted in photographs that it took of the events.
A human intruder, however, might simply steal the camera or remove the disk. The metal protective case allows for the use of cables and locks as a means of preventing theft, but I am thinking that a determined human being could find a way to damage the lens and other parts of the camera. Unless he was able to open the metal case, he wouldn't be able to remove either the camera or the disk though, and the camera would likely have recorded his image.
Nevertheless, while I highly recommend the Primos Truth Cam 35 for its intended purpose, as a wildlife camera, there are better choices for those who are looking for a security camera.