The British cryptologist Harry Hinsley, then working at Bletchley Park realised at the end of April 1941 that the German weather ships, usually isolated and unprotected trawlers, were using the same Enigma code books as were being used on the heavily armed U Boats.
28 of its recipients were officers of general's rank; the other two were the cryptologist Hermann Pokorny (1918) and Banfield himself.
The mathematician and cryptologist Alan Turing worked there in the latter part of the War on secure speech "scrambling".
Lt. Col. Jan Kowalewski (23 October 1892 – 31 October 1965) was a Polish cryptologist, intelligence officer, engineer, journalist, military commander, and creator and first head of the Polish Cipher Bureau.
As of October 2006, she and her ex-husband Eugene Kaspersky, a cryptologist and Kaspersky Lab CEO, owned about 80 percent of the company together.
After stealing the United States Declaration of Independence, cryptologist Benjamin Franklin Gates (Nicolas Cage) and Dr. Abigail Chase (Diane Kruger) find an Ottendorf cipher hidden in invisible ink of the back of the Declaration.
After France's capitulation to Germany in June 1940, he served with his Polish cryptologist comrades at Polish intelligence Station 300 (French codename: "Cadix") near Uzès in southern, Vichy France's "Free Zone."