英和和英

出典:『Wikipedia』 (2011/07/22 02:27 UTC 版)

英語による解説

引用

Physical security describes measures that are designed to deny access to unauthorized personnel (including attackers or even accidental intruders) from physically accessing a building, facility, resource, or stored information; and guidance on how to design structures to resist potentially hostile acts. Physical security can be as simple as a locked door or as elaborate as multiple layers of barriers, armed security guards and guardhouse placement. Good physical security uses the concept of layered defense, in appropriate combinations to deter and delay intrusions (passive defense), and detect and respond to intrusions (active defense). Ultimately it should be too difficult, risky or costly to an attacker to even attempt an intrusion. However, strong security measures also come at a cost, and there can be no perfect security. It is up to a security designer to balance security features and a tolerable amount of personnel access against available resources, risks to assets to be protected, and even aesthetics. There are also life-cycle sustaining costs to consider.