So one of the things that the Allies very specifically wanted to do in World War II was to hijack one of these devices, take it from a U-boat because if they had this physical machine, certainly can they start decrypting then the German messages.

所以同盟国在二战中想做的一件事,就是劫持其中一个装置，携带在U型潜水艇中，因为如果他们拥有了这种物理装置，他们就可以解码,德国人的密文。

哈佛公开课 - 计算机科学课程节选

In 1916 Chaim Weizmann, who later became Israel's first president, worked out how to use chestnuts to solve the lack of acetone, a component of the cordite needed by the British navy to repel German U-boat attacks in the first world war.

ECONOMIST: The Atlantic Ocean