Physical security has come a long way since the advent of the lock and key. But with evolution comes a fresh set of risks and vulnerabilities, only some of which we’ve learned to ameliorate. In order to make physical security work for us, we need to fully understand the new technologies that we’re incorporating into it. RFID badges are rife with security flaws, for example, and brute force attacks can be used to take advantage of the fact that badge ID numbers are typically incremental. Video surveillance is now sophisticated enough to incorporate facial recognition.”]