美国安全局正研发量子计算机
文章来源:未知 文章作者:enread 发布时间:2014-01-10 07:31 字体: [ ]  进入论坛
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The US National Security Agency is building a quantum computer to break the encryption that keeps messages secure, reports the Washington Post.

据《华盛顿邮报》报道,美国国家安全局正在研发一款用于破解加密信息的量子计算机。
 
The NSA project came to light in documents passed to the newspaper by whistle-blower Edward Snowden.
 
The spying agency hopes to harness the special qualities of quantum computers to speed up its code-cracking efforts.
 
The NSA is believed to have spent about $80m on the project but it has yet to produce a working machine.
 
If the NSA managed to develop a working quantum computer it would be put to work breaking encryption(加密) systems used online and by foreign governments to keep official messages secure, suggest the documents excerpted in the Post.
 
The quantum computer is being developed under a research programme called Penetrating1 Hard Targets and is believed to be conducted out of a lab in Maryland.
 
Many research groups around the world are pursuing the goal of creating a working quantum computer but those developed so far have not been able to run the algorithms required to break contemporary encryption systems.
 
Current computers attempt to crack encryption via many different means but they are limited to generating possible keys to unscramble(整理) data one at a time. Using big computers can speed this up but the huge numbers used as keys to lock away data limits the usefulness of this approach.
 
By contrast, quantum computers exploit properties of matter that, under certain conditions, mean the machine can carry out lots and lots of calculations simultaneously2. This makes it practical to try all the possible keys protecting a particular message or stream of data.
 
The hard part of creating a working quantum computer is keeping enough of its constituent3 computational elements, called qubits, stable so they can interact and be put to useful work.
 
The NSA is not believed to have made significant breakthroughs in its work that would put it ahead of research efforts elsewhere in the US and Europe. However, the documents passed to the Post by Edward Snowden suggest the agency's researchers are having some success developing the basic building blocks for the machine.


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1 penetrating ImTzZS     
adj.(声音)响亮的,尖锐的adj.(气味)刺激的adj.(思想)敏锐的,有洞察力的
参考例句:
  • He had an extraordinarily penetrating gaze. 他的目光有股异乎寻常的洞察力。
  • He examined the man with a penetrating gaze. 他以锐利的目光仔细观察了那个人。
2 simultaneously 4iBz1o     
adv.同时发生地,同时进行地
参考例句:
  • The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
  • The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。
3 constituent bpxzK     
n.选民;成分,组分;adj.组成的,构成的
参考例句:
  • Sugar is the main constituent of candy.食糖是糖果的主要成分。
  • Fibre is a natural constituent of a healthy diet.纤维是健康饮食的天然组成部分。
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