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Infrastructure security
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<p>Infrastructure security is the <a href="/facts/Security/B4uxkyxh">security</a> provided to protect <a href="/facts/Infrastructure/QJvbsSpl">infrastructure</a>, especially <a href="/facts/Critical_infrastructure/p0QG0R1h">critical infrastructure</a>, such as <a href="/facts/Airport/KQkDpK1n">airports</a>, <a href="/facts/Highway/2nxmEmgX">highways</a> <a href="/facts/Rail_transport/9nJQbsDV">rail transport</a>, <a href="/facts/Hospital/WaryeVJd">hospitals</a>, <a href="/facts/Bridge/vBJ7Hw8v">bridges</a>, <a href="/facts/Transport_hub/LthX69gf">transport hubs</a>, network communications, <a href="/facts/Media_(communication)/uflm14CI">media</a>, the <a href="/facts/Grid_(electricity)/RkWPqjmG">electricity grid</a>, <a href="/facts/Dam/BroJFhEI">dams</a>, <a href="/facts/Power_plant/vYeVY1fD">power plants</a>, <a href="/facts/Seaport/8gMBbCNH">seaports</a>, <a href="/facts/Oil_refinery/yeaW0UMv">oil refineries</a>, <a href="/facts/Liquefied_natural_gas_terminal/JMqvwLPu">liquefied natural gas terminals</a> and <a href="/facts/Water_system/IXMHuvYQ">water systems</a>. Infrastructure security seeks to limit vulnerability of these structures and systems to <a href="/facts/Sabotage/R7IXqV4e">sabotage</a>, <a href="/facts/Terrorism/DHJGPJ6P">terrorism</a>, and <a href="/facts/Contamination/RC0L7KRy">contamination</a>. </p><p>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 in others, which makes handing interdependencies a key concern. </p><p>There are several examples where an incident at one critical infrastructure site affects others. For example, in 2003, the Northeastern American areas experienced a <a href="/facts/Northeast_Blackout_of_2003/N8NqLM3Y">power outage</a> that appears to have originated in the Midwest, and possibly from a tree branch. In 2013, damage caused by <a href="/facts/Metcalf_sniper_attack/IhSdJzDy">a sniper attack</a> at an <a href="/facts/Electrical_substation/Iy8NeYzy">electrical substation</a> in California threatened power distribution throughout Silicon Valley. The <a href="/facts/2020_Nashville_bombing/zWlVkztr">2020 Nashville bombing</a> caused telecommunications outages in several states. </p>