Early in the second world war, Britain took its time to let America into the secrets of Ultra, the decryption of German secret communications by code-breakers at Bletchley Park.

第二次世界大战的早期，英国花时间让美国获知了Ultra的机密，这是电码译者在Bletchley Park破译的德国机密通信的译码。

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Indeed, America and Britain were so deeply penetrated that the Russians soon found out about Venona, changing their codes and cipher machines on October 29th 1948—"Black Friday" for code-breakers.

毫无疑问的，美国和英国非常清楚苏联很快就发现了Venona的存在，并更改了了他们的密码和密码机在1948年10月29号—译码者的“黑色星期五”。

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Experienced code-breakers will be looking, essentially, for three things by which to judge whether Bali has been a success or a failure.

ECONOMIST: Climate change

In The Code Book: The Evolution of Secrecy from Mary, Queen of Scots, to Quantum Cryptography, due out soon from Doubleday, British author Simon Singh traces the evolution of the centuries-old battle between code writers and code breakers.

FORBES: I've got a secret

How would they know about our women prisoners of war, or female military astronauts and code breakers, and the courage of young African-American women soldiers during World War II?

WHITEHOUSE: We Started With A Dream