![]() ![]() Coast Guard, which was later assigned to hunt Nazi spies in the Western Hemisphere. In 1931 she launched an elite codebreaking unit within the U.S. Then she went on to a 20-year career with the Treasury Department, exposing the pirate radio networks of rum smugglers and drug smugglers during the 1920s and 1930s. Throughout World War I she solved messages sent by Germany and Mexico. Starting in the field in 1916, with a literature degree from Hillsdale College and no formal math training, Elizebeth co-authored a series of papers with her husband, William Friedman, that laid the foundation for the modern science of codes and ciphers. Elizebeth Smith Friedman (1892-1980) was a pioneering American codebreaker, a person who solves secret messages without knowing the key. ![]()
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