If you fancy yourself as a budding sleuth, hacker or code-breaker, GCHQ has released its annual Christmas challenge and is ...
The United States National Security Agency — the country’s premier signals intelligence organization — recently declassified a Cold War-era document about code-breaking. The first two parts of the ...
Editor's note: This story was updated on Sept. 7, 2021 to reflect Jeuel Bannister Esmacher's alma mater. Jeuel Bannister Esmacher, 97, kept for decades the secret of her role in America’s World War II ...
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