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雙語暢銷書《艾倫圖靈傳》第9章:退隱山林(129)

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The analogy with cryptanalysis is even closer in that the crystallographer attacks the problem, at first sight too enormous for contemplation, by making a hypothesis about the structure of the crystal.

padding-bottom: 70.63%;">雙語暢銷書《艾倫圖靈傳》第9章:退隱山林(129)

與密碼分析更爲相似之處在於,結晶學家在處理這個問題時,會首先對晶體的結構進行假設。

Thus Watson and Crick pursued the DNA analysis, as did Pauling, by making good guesses about the helix structure, and thus getting closer and closer to the solution.

就像沃森和克里克在研究DNA時,假設了螺旋形的結構,然後再縮小範圍,逐漸逼近真正的解。

This is essentially the same idea as the 'Probable Word' method, which also effects a drastic reduction in the number of possible keys—

這在本質上與"有可能的明文"是出於同樣的想法,後者也可以急劇地縮小有可能的密鑰範圍,

so that with the Enigma, for instance, they were left only with a small number of Bombe 'stops' to try out for sensible German plain-text.

比如說對於謎機,他們根據炸彈機少量的停機,就能試驗出合理的德文明文。

It is not surprising that Alan Turing could see how to quantify the idea of information required for a guess to be possible: this was very close to the quantification of 'weight of evidence' which constituted his major conceptual advance at Bletchley.

圖靈能夠量化地計算所需的信息量,這也是在意料之中的,這與他在布萊切利提出的"證據權重"非常接近,而這正是他當時的核心想法。

Shannon was sceptical about this programme of work, and Shannon had a good point.

香農非常懷疑這項實驗的有效性,而且他有很充分的理由。

By 1977 computer calculations would show that among the first seven million zeroes of the zeta function, there is not one that lies off the special line.

後來到了1977年,更加深入的計算機實驗證明,黎曼ζ函數的前700萬個零點,沒有一個是脫離那條特殊直線的。

This was a case where a brute force attack could yield only a negative result.

這是暴力窮舉方法的一個負面例子。

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