雙語暢銷書《艾倫圖靈傳》第7章:運轉起來(29)
Assuming the circuit to be 'linear', meaning that the input of a 'spike' of say half a unit would produce exactly half of this response, the effect of feeding into it the train of 'spikes' would be to 'join the dots' in a very precise way.
The information of each 'spike' would go exactly into the amplitude of the response of this circuit one unit of time later, and nowhere else.
每個脈衝攜帶的信息，都會準確地體現在1單位時間點上的反饋振幅中。The transmission would then be straightforward, and could be achieved by perfectly standard means; the decipherment process did not require any further new ideas.
然後就可以直接進行傳輸了，接收方可以通過非常標準的方式接收，而解碼過程也不需要什麼特殊技術。
Apart from the question of supplying a key-system, this was all that was required for the Delilah to effect an 'adding-on' encipherment of speech,
現在如果再有一個供應密鑰的系統，那麼黛麗拉就可以使用了。the analogy of what agents like Muggeridge, or the machines which produced the Fish signals, or the Rockex, were all alike doing for telegraph or teleprinter.
與馬格里奇的想法、魚機、洛克凱斯機一樣，If the key were truly 'random', or without any discernible pattern, such a speech cipher system would be as secure as the Vernam one-time cipher for telegraph tape, and on exactly the same argument.
只要密鑰是隨機的，或者說沒有能被識別的規律，那麼這套語音加密系統就會像維爾南一次性密碼一樣安全。From the enemy's point of view, if all keys were equally probable, then all messages would be equally likely. There would be nothing to go on.
道理是一樣的，從敵方的角度來看，如果所有可能的密鑰具有相等的概率，那麼所有可能的明文也就具有相等的概率。這樣就實現了艾倫的目標。The disadvantage of the simple Delilah system, as compared with the X-system, was that its output signal would be one of bandwidth 2000 Hz, rather than a stream of digits, and that it would have to be communicated perfectly, or all would be lost.
與X系統相比，基本的黛麗拉系統的缺點是，它輸出的是一個2000Hz帶寬的信號，而不是一串數字，還有它對通信條件的要求極高，稍有差錯就會丟失信息。In particular, any variation in time delay, or distortion in amplitudes, would ruin the decipherment process.
特別是，任何時滯的變化，或者振幅的稍微失真，都會使信息無法解密。Sender and receiver would have to keep in time to the microsecond for the same reason. This was why it could never be used for long-range short-wave transmissions.
發送方和接收方必須保持微秒級的同步，因此不能通過遠距離短波來發送。But it could be used for local short-wave, for VHF and for telephone communication. For tactical or domestic purposes, therefore, it held considerable potential.
但是它能夠用於VHF或電話系統的本地短波，因此在短途或國內用途上具有很大的潛力。
