AB, Bucknell University, 1951. Doctor of Philosophy, Oxford University, England, 1974.
Reporter Jersey Journal, Jersey City, 1952-1953. Copyboy New York Daily News, 1953-1955. Reporter Newsday, Garden City, New York, 1955-1963.
Freelance writer, 1963-1965, 67-74. News desk editor International Herald Tribune, Paris, 1965-1967. Professor journalism New York University, 1974-1979.
Assistant viewpoints editor Newsday, Melville, New York, 1979-1994, member editorial board, 1988-1994. Scholar in residence National Security Agency, 1995. Assistant editor features Newsday, Melville, New York, 1996-1998.
Retired, 1999; freelance author, since 1999. Adjunct professor modern political and military intelligence Yale University, New Haven, 1985, Columbia University, New York City, 1986-1988. Founding co-editor Cryptologia magazine, since 1977.
Member editorial board Intelligence and National Security, since 1986, International Journal Intelligence and Counterintelligence, since 1986, Journal Cryptology, 1991-2001, Journal Intelligence History, since 2001. Witness Congressional committees. Adjunct professor journalism State University of New York, Stony Brook, 1991-1994.
(The magnificent, unrivaled history of codes and ciphers -...)
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(In Kahn on Codes, David Kahn, America's foremost authorit...)
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(The code breakers)
Board trustees St. Antony's College Trust, retired, 2000. Board directors National Cryptologic Museum Foundation. Senior associate member St. Antony's College, Oxford University, 1972-1974.
Board directors Great Neck Library., 2002-2008, president, 2006-2008. Patron Bletchley Park (United Kingdom) Trust. Member American Cryptogram Association (president 1965-1967), World World War II Studies Association (board directors since 1987), International Intelligence History Association, International Spy Museum (member advisory board directors), International Association for Cryptologic Research (board directors 1980-1990), Century Association, Association des Réservistes du Chiffre et de la Sécurité de l'Information (France), Phi Beta Kappa.
Married Susanne Monika Fiedler, October 22, 1969 (divorced January 1995). Children: Oliver, Michael.