Enigma: Actions involved in the 'Double Stepping' of the Middle Rotor. - David H. Hamer (Cryptologia, 1997)

Letter to the Editors M2114: a Naval Enigma. - David Hamer (Cryptologia, 1998)

Enigma Variations: an Extended Family of Machines. - David H. Hamer; Geoff Sullivan; Frode Weierud (Cryptologia, 1998)

G-312: An Abwehr Enigma. - David H. Hamer (Cryptologia, 2000)

The Enigmas - and Other Recovered Artefacts - of U-85. - David H. Hamer (Cryptologia, 2003)

Review of Thirty Secret Years: A.G. Denniston's Work in Signals Intelligence: 1914-1944 by Robin Denniston. - David Hamer (Cryptologia, 2007)

Review of Herivelismus and the German Military Enigma by John Herivel. - David Hamer (Cryptologia, 2009)

Review of From Bletchley with Love by Mavis Batey. - David Hamer (Cryptologia, 2009)

The David Kahn Collection at NSA's National Cryptologic Museum. - David Hamer (Cryptologia, 2011)

Review of 'Dilly - The Man Who Broke Enigmas' by Mavis Batey. - David Hamer (Cryptologia, 2011)

Review of The Secrets of Station X - How the Bletchley Park Codebreakers Helped Win the War by Michael Smith. - David H. Hamer (Cryptologia, 2012)

First Charlotte International Cryptologic Symposium and Exhibit. - David H. Hamer (Cryptologia, 2012)

Review of Hitler's Codebreakers - German Signals Intelligence in World War 2 by John Jackson. - David H. Hamer (Cryptologia, 2013)

Review of Dönitz, U-Boats, Convoys by Jak P. Mallmann Showell. - David H. Hamer (Cryptologia, 2014)

Review of Gordon Welchman: Bletchley Park's Architect of Ultra Intelligence by Joel Greenberg. - David H. Hamer (Cryptologia, 2015)

Review of Prof: Alan Turing Decoded by Dermot Turing. - David H. Hamer (Cryptologia, 2016)

Review of The Secret World by Hugh Trevor-Roper. - David H. Hamer (Cryptologia, 2017)

Review of Solving Enigma's Secrets by John Jackson. - David H. Hamer (Cryptologia, 2017)