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雙語暢銷書《艾倫圖靈傳》第5章:解謎接力賽(39)

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Yet no serious analyst would be daunted by this frightening number.

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不過,嚴謹的分析員們並沒有被這個可怕的數字嚇倒。

Large numbers would not in themselves guarantee immunity from attack.

巨大的數字本身,並不能保證自己不受攻擊。

Anyone who had solved a puzzle-page cryptogram had succeeded in-eliminating all but one of the 403,291,461,126,605,635,584,000,000 different alphabetic substitutions.

尤其是對那位在普林斯頓玩尋寶遊戲的人來說,他曾經從403, 291, 461, 126, 605, 635, 584, 000, 000注種可能的替換關係中找出了正確答案。

It could be done because such facts as that E was common, AO rare, and so forth, would each serve to eliminate vast numbers of possibilities at once.

這並非毫無頭緒,因爲E是很常用的,而AO是很少見的,通過類似這樣的線索,就可以將大量的可能排除掉。

It can be seen that the sheer number of plugboards is not in itself the problem, by considering an entirely hypothetical machine, in which a plugboard swapping is applied only before encipherment by a basic Enigma.

可以看到,假設有一臺謎機,只在輸入轉盤編碼之前使用一次配線板,那麼配線板引起問題就不難解決。

Suppose that for such a machine, it is known for certain that the cipher-text FHOPQBZ is the encipherment of GENERAL.

我們假設這臺機器會把GENERAL編碼爲FHOPQBZ。

Once again, it would be possible to feed the letters FHOPQBZ into seven consecutive Enigmas, and examine the output.

同樣地,我們可以把FHOPQBZ輸入七臺相連的謎機,並檢查它的輸出。

But this time, one could not expect the letters GENERAL to emerge, for an unknown plugboard swapping would have been applied to those letters.

但是這一次,由於引入了一個未知的配線板,所以不能指望它會輸出GENERAL。