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Infrastructure security is the security provided to protect infrastructure, especially critical infrastructure, such as airports, highways 〔http://www.tsa.gov/travelers/highway/index.shtm〕 rail transport, hospitals, bridges, transport hubs, network communications, media, the electricity grid, dams, power plants, seaports, oil refineries, and water systems. Infrastructure security seeks to limit vulnerability of these structures and systems to sabotage, terrorism, and contamination.〔http://www.tsa.gov/who_we_are/index.shtm〕 Critical infrastructures naturally utilize information technology as this capability has become more and more available. As a result, they have become highly interconnected, and interdependent. Intrusions and disruptions in one infrastructure might provoke unexpected failures to others. How to handle interdependencies becomes an important problem.〔 The most recent example of vulnerable infrastructure was the electrical grid in 2003, when Northeastern American areas experienced a power outage that appears to have originated in the Midwest, and possibly from a tree branch.〔http://www.webcitation.org/query?url=http://www.geocities.com/blohm_r/NYTimes130504.htm/&date=2009-10-25+13:43:27〕 ==Potential causes of infrastructure failure== Critical infrastructure is vital for essential functioning of a country. Incidental or deliberate damage will have serious impact on the economy as well as providing essential services to the communities it serves. There are a number of reasons why infrastructure needs to be heavily secured and protected. * Terrorism - person or groups deliberately targeting critical infrastructure for political gain. In the November 2008 Mumbai attacks, the Mumbai central station and hospital were deliberately targeted. * Sabotage - person or groups such as ex-employee, political groups against governments, environmental groups in defense of environment. Refer to Bangkok's International Airport Seized by Protestors. * Information warfare - private person hacking for private gain or countries initiating attacks to glean information and also damage a country's infrastructure. For example, in cyberattacks on Estonia and cyberattacks during the 2008 South Ossetia war. * Natural disaster - hurricane or natural events which damage critical infrastructure such as oil pipelines, water and power grids. See Hurricane Ike and Economic effects of Hurricane Katrina. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Infrastructure security」の詳細全文を読む スポンサード リンク
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