A few years back, a customer asked us to test their newly installed (and very expensive) surveillance and security system. The products promised them an automated system that was so secure they wouldn’t have to place a security guard there.

After some recon we discovered that while the entrance was guarded by a very secure keypad + access card combination lock, the inside had an automated “unlock” sensor so if anyone wanted to come out, the door would unlock from the inside.

After some careful review of the pictures we took we found out that the top and bottom of the doors were not sealed tight against the floor, we could see a tiny bit of light from there (we took the pictures with a high resolution night capable camera). A plan was set in motion.

We arrived, we approached the door and we remove the piece of gear that would, hopefully, allow us to bypass the very secure lock: a old credit card.

We slid the old credit card under the door and… nothing.