Isabelle,
Just as Teisha said, many companies I have worked for in the past also used some sort of RFID tags. For example, only certain employees could access certain areas. For example, the warehouse held firearms for distribution to the stores. Thus only the people tasked with being in the cage. Were allowed into it. Along with other previsions such as CCTV and who knows how many other instances of protection that went with it. Since it was regularly inspected and audited by the ATF. So combining physical and digital security. They go hand in hand it is hard to simply have one or the other and believe your data/facility is safe.