Frank Petrexa
Tribune
She did what I do for passwords--a code (they were written in French) then a cipher (replacing letters with other symbols) to overlay the code. If I recall, the Enigma machine used a (mechanical) computer for the cipher, which was generated by an initial setting that was changed regularly. This required a lot of work for Turing and his computers. It also required some old-fashioned intelligence. In one operation the Royal Navy sent ships in a gird pattern to find, surprise, and board a Nazi weather ship to seize the code books and the cipher machines to get the initial settings (God was on the side of the Allies, apparently, because weather flows west to east and the Nazis needed western weather sources the Allies' geography furnished for free). Royal Navy personnel took a lot of risks (and sometimes lost) trying to retrieve Nazi code materials from sinking ships and submarines.Some very interesting letters she wrote while she was imprisoned have only just been recognised and deciphered:
https://www.bbc.co.uk/news/uk-scotland-64568222
Innovation and initiative spike during wars, when bean counters worried about "cash flow" and "return on equity" are ignored.