Dr Geoffrey Timms OBE FRSE (1903–1982) was a 20th century British mathematician and cryptoanalyst. In the Second World War he was one of the several mathematicians working alongside Alan Turing at Bletchley Park breaking the Enigma code.
He studied Mathematics at the University of Leeds graduating MA in 1925, then did postgraduate studies at Cambridge University, gaining his doctorate (PhD) in 1928. In 1929 he began lecturing in mathematics at St Andrews University.
In 1933 he was elected a Fellow of the Royal Society of Edinburgh. His proposers were fellow physicians Herbert Westren Turnbull, Edward Thomas Copson, Alexander Craig Aitken and Sir Edmund Taylor Whittaker.
A recognised mathematical genius he was seconded to work on the cracking of the Enigma code during the Second World War. He officially resigned from St Andrews in September 1945 to continue working with the Foreign Office, and got a position at GCHQ.
In retired in 1968.
- Breaking Teleprinter Ciphers at Bletchley Park, by Good, Michie and Reed
- Colossus: The Secrets of Bletchley Park, B J Copeland
- Biographical Index of Former Fellows of the Royal Society of Edinburgh 1783–2002 (PDF). The Royal Society of Edinburgh. July 2006. ISBN 0-902-198-84-X.
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