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美國(guó)國(guó)防公司ITT公司提出了一項(xiàng)被稱為量子密鑰分發(fā)（QKD）的技術(shù)，主要用于處理美國(guó)海軍在建立潛艇安全<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/通信"><em>通信</em></a>連接方面遇到的技術(shù)挑戰(zhàn)。<P sizset="63" sizcache="1">　　該技術(shù)利用了<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/光子"><em>光子</em></a>的量子特性，它能夠以0和1進(jìn)行編碼，從而產(chǎn)生和交換密鑰。如果外部力量試圖攔截<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/光子"><em>光子</em></a>，那么這種屬性就會(huì)遭到破壞，警報(bào)就會(huì)發(fā)出。</P><P sizset="64" sizcache="1">　　ITT公司的量子技術(shù)負(fù)責(zé)人表示，該技術(shù)將使?jié)撏г趲字軆?nèi)都無(wú)法被探測(cè)到。采用QKD，潛艇能夠在水下100米建立安全連接，并將<a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/激光"><em>激光</em></a><a class="contentlabel" href="http://www.ex-cimer.com/news/listbylabel/label/光子"><em>光子</em></a>傳輸?shù)叫l(wèi)星，從而轉(zhuǎn)播到基地。在進(jìn)行密鑰交換后，潛艇能夠在保證安全的情況下通過(guò)<a class="contentlabel" 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