in The Oxford Companion to Australian Military History
January 2008; p ublished online January 2009 .
Reference Entry. Subjects: Military History. 431 words.
or cryptography is an aspect of signals intelligence that has assumed considerable importance in twentieth-century warfare. Australian involvement in code-breaking
in The Oxford Essential Dictionary of the U.S. Military
January 2001; p ublished online January 2002 .
Reference Entry. Subjects: Military History. 16 words.
n.the decrypting of code or cipher messages by unauthorized persons (the enemy).See coding and decoding.
in Diplomatic History
November 2007; p ublished online November 2007 .
Journal Article. Subjects: International History; United States History. 8553 words.
Secret Messages: Codebreaking and American Diplomacy, 1930–1945. By Richard J . Aldrich. (New York: Cambridge University Press, 2000. xxiv, 500 pp. $34.95, isbn 0-521-64186-1.)
in Journal of American History
December 2001; p ublished online December 2001 .
Journal Article. Subjects: United States History. 942 words.
David Kahn. The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking. New Haven: Yale University Press. 2004. Pp. xxi, 318. $32.50.
in The American Historical Review
April 2006; p ublished online April 2006 .
Journal Article. Subjects: World History. 690 words.
in The Oxford Dictionary of Phrase and Fable
January 2005; p ublished online January 2006 .
Reference Entry. Subjects: History of English. 29 words.
near Milton Keynes in Buckinghamshire, during the Second World War the centre of British codebreaking activity, where the Enigma code