[news.bbc.co.uk]

Online amateurs crack Nazi codes

Three German ciphers unsolved since World War II are finally being cracked, helped by thousands of home computers.

The codes resisted the best efforts of the celebrated Allied cryptographers based at Bletchley Park during the war.

Now one has been solved by running code-breaking software on a “grid” of internet-linked home computers.

The complex ciphers were encoded in 1942 by a new version of the German Enigma machine, and led to regular hits on Allied vessels by German U-boats.

Allied experts initially failed to deal with the German adoption in 1942 of a complex new cipher system, brought in at the same time as a newly upgraded Enigma machine.

The advancement in German encryption techniques led to significant Allied losses in the North Atlantic throughout 1942.

The three unsolved Enigma intercepts were published in a cryptography journal in 1995 and have intrigued enthusiasts ever since.

Although assumed to have little historical significance, they are thought to be among just a handful of German naval ciphers in existence still to be decoded.

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