If you've got a message to keep safe, look to the skies. You could use the afterglow of the big bang to make encryption keys - all you need is a radio telescope. The security of many systems relies on generating large random numbers to act as keys to encrypt information. Computers can use algorithms to spa wn these keys, but they aren't truly random, so another computer armed with the same algorithm could potentially duplicate the key. An alternative is to rely on physical randomness, like the weather, the thermal noise on a chip or the timing of someone's keystrokes. Now Jeff rey Lee and Gerald Cleaver at Baylor University in Waco, Texas, have taken this to the extreme by suggesting we use the thermal radiation left over from the big bang - the cosmic microwave background.
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机译:如果您有保持安全的讯息,请仰望天空。您可以使用爆炸的余辉来制作加密密钥-您所需要的只是一架射电望远镜。许多系统的安全性依赖于生成较大的随机数来充当加密信息的密钥。计算机可以使用算法来生成这些密钥,但是它们并不是真正随机的,因此配备相同算法的另一台计算机可能会复制密钥。另一种选择是依靠物理随机性,例如天气,芯片上的热噪声或某人的击键时间。现在,得克萨斯州韦科市贝勒大学的Jeff rey Lee和Gerald Cleaver通过建议我们使用大爆炸所遗留的热辐射-宇宙微波背景,将其推向了极端。
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