雙語暢銷書《艾倫圖靈傳》第5章:解謎接力賽(20)

The more important complicating feature, however, was the attachment of a plugboard.

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然而，更重要的複雜特性是配線板，

It was this that distinguished the military from the commercial Enigma, and made it something that had unnerved the British analysts.

這是軍用版和商用版的主要差別，也是最讓英國分析員垂頭喪氣的東西。

It had the effect of performing automatically an extra swapping of letters, both before entering the rotors, and after emerging from them.

它的作用是，可以在輸入之前，以及輸出之後，分別自動地進行一次額外的字母對換。

Technically, this was achieved by attaching wires, with plugs at each end, into a plugboard with 26 holes—rather like making connections on a telephone switchboard.

技術上來說，是在電線的一端安上插頭，插入一個有26個孔的配線板，

It required ingenious electrical connections, and the use of double wires, to have the required effect.

這需要巧妙的電路連接，還要使用雙股電線。

Until late 1938, it was usual in the German use of the machine to have only six or seven pairs of letters connected in this way.

在1938年末，德國的機器中通常只對六或七對字母進行這種對換。

Thus with the rotors and reflector of the basic machine in such a state as to effect the substitution

假設原型版謎機通過轉盤和反饋器，在某種狀態下，形成了這樣一個替換表：

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

C O A I G Z E V D S W X U P B N Y T J R M H K L Q F

C O A I G Z E V D S W X U P B N Y T J R M H K L Q F

and with the plugboard wires set up to Connect the pairs

結合配線板，進行額外的7組對換：

(AP) (KO) (MZ) (IJ) (CG) (WY) (NQ),

(AP) (KO) (MZ) (IJ) (CG) (WY) (NQ),

the result of pressing the A key would be to send a current through the plugboard wire to P, then through the rotors and out again to N, then through the plugboard wire to Q.

那麼產生的結果就是，按下A鍵，電流會通過配線板傳到P，然後由轉盤傳到N，最後再由配線板傳到Q。