CompTIA® Security+™: Study Guide, Fifth Edition

Keeping Physical Security Meaningful

It is difficult to overstress the importance of physical security. Physical security is controlling who can and cannot gain physical proximity to assets. It is a form of access control: defining who has access and to where and who doesn’t have access. Without physical access control, there is no security. Every technological security control can be overcome with the right tools or enough time. Even cryptography will fail eventually. Brute-force attacks are always successful, given enough time. But time itself is becoming an ever smaller relative value with the onset of massive parallel distributed processing. For example, with the services of distributed.net or its competitors, 10,000 computing hours can be ...