第一次世界大战时,英德双方的情报部门通过侦听,经常能够破译对方的密码,为了迷惑对方,双方又常常使用已确认被对方破译的密码向对方提供一些假情报。密码战就这样寂静无声而又紧张地进行着。 1916年5月26日,德国海军新明斯特情报监听站海军处的破译员兰格,从一大堆英国人的来往电文中发现了一份不寻常的电报。那是一艘英国驱逐舰发给英国海军部的电报。电报说,奥克尼以西的一条航道上的水雷已清除完毕。兰格感到很奇怪,因为,这艘驱逐舰不是象平常那样向基地报告,而是直接向英国 During the First World War, the intelligence agencies at both Anglo-German countries often could decipher each other’s passwords by listening. In order to confuse each other, the two sides often used the passwords that have been confirmed to be deciphered by the other party to provide fake intelligence to each other. The password war was quiet and stressless. On May 26, 1916, Lange, a naval interpreter at the Nemunuest Intelligence Station in Germany, found an unusual telegram from a large group of British interlocutors. It was a telegraph sent by the British destroyers to the British Admiralty. Telegraphs said that the mines on a fairway west of Orkney had been cleared. Lange felt strange because the destroyer did not report to the base as it usually did but to the UK