While efforts in Europe focused on Enigma, the outcome of the Pacific War hinged on intercepting and breaking Japanese naval ciphers—most notably the code known as JN-25. This code was a two-step ...

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A woman who worked at the Bletchley Park codebreaking centre during World War Two is celebrating her 106th birthday. Joan Mace worked as a teleprinter operator at the site where Alan Turing cracked ...