關燈 巨大 直達底部
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第15部分

對應的密文字母是…i…a…oto,就可以假設字母串SGRLSIWI為單詞Miyamoto。如果是這樣,就有了S=m,R=y。字母串VNGJL對應的密文字母串是…hina,於是就可以假定為單詞China,於是又有了字母V=c。把這些新推出的明文字母填入後,又能相應地推斷出其他字母來,這就是密碼破譯中最簡單的猜字法。學生在學習英語的時候也常常會做類似的一些根據已知單詞的部分字母來填寫出完整的單詞的練習題。

最後經過逐步的假設和代入,終於將所有的字母替換表找了出來:

表5

明文 A B C D E F G H I J K L M N

密文 L O V E Y U P N G Z H A S J

明文 O P Q R S T U V W X Y Z / /

密文 I X T D B W F K M Q R C / /

於是就能得出一篇完整的電文:

Miyamoto in your file:China headquarters has decided to soon launch a full…scale offensive,the attack will be the first choice in North China,North China after the war,Shanghai will bee the focus of attack on our military objectives。Shanghai All of the military intelligence operations,the Army and Navy of the intelligence agencies have collected very detailed。

You need to pleted by the Department’s mission is to:assist in the pletion of snow Chuan dao fang zi plan of action。Shanghai celebrities from all walks of life will pull over,even if I can not be used,but also as far as possible their stay in Shanghai,even if it is to try to help them live near the British and French concession in order to retain the army stationed in Shanghai after the political and economic capital。If it can not be left behind,and kill them all。China’s Bureau of Investigation and Statistics of the Military Council and the mission and the Chinese munist spies to take corresponding measures,but should try to avoid a major conflict,when all the snow in the main action。Secret Chuan dao fang zi will e to Shanghai,for all projects and solely responsible for her。

再翻譯成漢語就是:

宮本中佐閣下:大本營已決定即將對華發動全面進攻,攻擊的首選地點將在華北,華北開戰之後,上海將成為我軍重點進攻的目標。有關上海作戰的一切軍事情報,陸軍和海軍各情報機關都已收集得非常詳細。

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