User:TedColes/sandbox

A-D

• Aldrich, Richard J. (2010), GCHQ: The Uncensored Story of Britain's Most Secret Intelligence Agency, Harper Press, ISBN 978-0007278473
• Alexander, C. Hugh O'D. (c. 1945), Cryptographic History of Work on the German Naval Enigma, The National Archives, Kew, Reference HW 25/1
• Anderson, David (2007), Was the Manchester Baby conceived at Bletchley Park? (PDF), British Computer Society, retrieved 25 April 2015
• Bamford, James (2001), Body Of Secrets: How America's NSA & Britain's GCHQ Eavesdrop on the World, Century, ISBN 978-0712675987
• Batey, Mavis (2008), From Bletchley with Love, Milton Keynes: Bletchley Park Trust, ISBN 978-1-906723-04-0
• Bauer, Friedrich Ludwig (2002), Decrypted secrets: methods and maxims of cryptology (3rd rev. and updated ed.), New York: Springer, ISBN 978-3540426745
• Bauer, F.L. (2007), "British and US cryptanalysis of the Wehrmacht Enigma", in de Leeuw, Karl; Bergstra, J. A. (eds.), The history of information security: a comprehensive handbook, Elsevier, ISBN 978-0-444-51608-4
• Bauer, Friedrich L. (2006a), The Tiltman Break Appendix 5 in Copeland 2006, pp. 370–377
• Bauer, Friedrich L. (2006b), Newman's Theorem Appendix 8 in Copeland 2006, pp. 370–377
• Bauer, Friedrich L. (2006c), Origins of the Fish Cypher Machines Appendix 12 in Copeland 2006, pp. 411–417
• Bemer, Bob, Colossus – World War II Computer: The First Word Processor Report of the announcement of Colossus at the International Research Conference on the History of Computing, in Los Alamos, New Mexico, that began on 10 June 1976
• Bennett, Ralph (1999) [1994], Behind the Battle: Intelligence in the war with Germany, 1939-1945 (New and Enlarged ed.), London: Random House, ISBN 978-0712665216
• Bertrand, Gustave (1973), Enigma ou la plus grand énigme de la guerre 1939–1945 (Enigma: The Greatest Enigma of the War of 1939–1945), Paris: Librairie Plon
• Bloch, Gilbert (1987), "Enigma before Ultra: Polish Work and the French Contribution - Translated by C.A. Deavours", Cryptologia (published July 1987)
• Bowden, B.V., ed. (1953), Faster Than Thought, London: Pitman, ISBN 0-273-41330-9
• Bowler, Eileen Eveline (9 November 2005), WW2 People's War, An Archive of World War Two Memories: Listening to the Enemy Radio, BBC London CSV Action Desk
• Briggs, Asa (2011), Secret Days: Code-breaking in Bletchley Park, Barnsley, England: Frontline Books, ISBN 978-1-84832-615-6
• Brown, Brandi Dawn (1998), Enigma- German Machine Cipher- "Broken" by Polish Cryptologists, retrieved 9 June 2010
• Brzezinski, Zbigniew (2005), Ciechanowski, Stanisław (ed.), Marian Rejewski, 1905-1980: living with the Enigma secret, The Unknown Victors, Bydgoszcz, Poland: Bydgoszcz City Council, pp. 15–18, ISBN 83-7208-117-4
• Budiansky, Stephen (2000), Battle of wits: The Complete Story of Codebreaking in World War II, Free Press, ISBN 978-0-684-85932-3 A short account of World War II cryptology which covers more than just the Enigma story.
• Budiansky, Stephen (2006), Colossus, Codebreaking, and the Digital Age in Copeland 2006, pp. 52–63
• Burke, Colin B. (2002) [1994], It Wasn't All Magic: The Early Struggle to Automate Cryptanalysis, 1930s-1960s (PDF), Fort Meade: Center for Cryptologic History, National Security Agency
• Bury, Jan (2004), "Polish Codebreaking during the Russo-Polish War of 1919–1920", Cryptologia, 28 (3): 193–203, doi:10.1080/0161-110491892872, ISSN 0161-1194, S2CID 205486323
• Calvocoressi, Peter (2001) [1980], Top Secret Ultra, Cleobury Mortimer, Shropshire: M & M Baldwin, ISBN 0-947712-41-0
• Carter, Frank, From Bombe 'stops' to Enigma keys (PDF), Technical Papers, Milton Keynes: Bletchley Park Trust
• Carter, Frank (2010), "The Turing Bombe", The Rutherford Journal, 3, ISSN 1177-1380
• Carter, Frank (2008), Codebreaking with the Colossus Computer, Bletchley Park Reports, vol. 1 (New ed.), Bletchley Park Trust, ISBN 978-1-906723-00-2
• Churchhouse, Robert (2002), Codes and Ciphers: Julius Caesar, the Enigma and the Internet, Cambridge: Cambridge University Press, ISBN 978-0-521-00890-7
• Chandler, W. W. (1983), "The Installation and Maintenance of Colossus", IEEE Annals of the History of Computing, 5 (3): 260–262, doi:10.1109/MAHC.1983.10083, S2CID 15674470
• Chodos, Alan (2022). "August 1946: The Moore School Lectures". American Physical Society. 11 (4).
• Churchill, Winston (1949), Their Finest Hour, Boston: Houghton Mifflin
• Comer, Tony (2021), Commentary: Poland's Decisive Role in Cracking Enigma and Transforming the UK's SIGINT Operations, Royal United Services Institute
• Coombs, Allen W. M. (1983), "The Making of Colossus", IEEE Annals of the History of Computing, 5 (3): 253–259, doi:10.1109/MAHC.1983.10085, S2CID 597530
• Copeland, Jack (2004), Copeland, B. Jack (ed.), The Essential Turing: Seminal Writings in Computing, Logic, Philosophy, Artificial Intelligence, and Artificial Life plus The Secrets of Enigma, ISBN 0-19-825080-0
• Copeland, B. J. (2004), "Colossus: its origins and originators", IEEE Annals of the History of Computing, 26 (4): 38–45, doi:10.1109/MAHC.2004.26, S2CID 20209254
• Copeland, B. Jack (2005), Alan Turing's Electronic Brain, Oxford: Oxford University Press, ISBN 978-0-19-960915-4
• Copeland, Jack (2006), The German Tunny Machine in Copeland 2006, pp. 36–51
• Copeland, Jack (2006), Machine against Machine in Copeland 2006, pp. 64–77
• Copeland, Jack (2006), Colossus and the rise of the Modern Computer in Copeland 2006, pp. 101–115
• Copeland, Jack (2006), Turingery in Copeland 2006, pp. 378–385
• Copeland, B. Jack, ed. (2006), Colossus: The Secrets of Bletchley Park's Codebreaking Computers, Oxford: Oxford University Press, ISBN 978-0-19-284055-4
• Copeland, B. Jack (2008), "The Modern History of Computing", in Zalta, Edward N. (ed.), The Stanford Encyclopedia of Philosophy (Fall 2008 ed.)
• Copeland, B. Jack (2010), "Colossus: Breaking the German 'Tunny' Code at Bletchley Park. An Illustrated History", The Rutherford Journal, 3
• Copeland, B. Jack (2012), Turing: Pioneer of the Information Age, Oxford: Oxford University Press, ISBN 978-0-19-963979-3
• Cragon, Harvey G., From Fish to Colossus: How the German Lorenz Cipher was Broken at Bletchley Park (Cragon Books, Dallas, 2003; ISBN 0-9743045-0-6) – A detailed description of the cryptanalysis of Tunny, and some details of Colossus (contains some minor errors)
• Ćwięk, Henryk (2001), Przeciw Abwehrze (Against the Abwehr), Warsaw: Bellona, ISBN 9788311091870
• Dakin, Alec (1993) [1992], The Z Watch in Hut 4, Part I in Hinsley & Stripp 1993, pp. 50–56
• Davies, Donald (1999), "The Bombe — a Remarkable Logic Machine", Cryptologia, 23 (2): 108–138, doi:10.1080/0161-119991887793, ISSN 0161-1194
• Davies, Donald (1999), "Effectiveness of the Diagonal Board", Cryptologia, 23 (3): 229–239, doi:10.1080/0161-119991887865, ISSN 0161-1194
• DeBrosse, Jim; Burke, Colin (2004), The Secret in Building 26: The Untold Story of America's Ultra War Against the U-Boat Enigma Codes, Random House, ISBN 978-0375508073
• Desch, Joseph R. (21 January 1942), 1942 Research Report (PDF), retrieved 20 July 2013{{citation}}: CS1 maint: date and year (link)

E-H

• Edgerley, Peter (2006), The Testery and the Breaking of Fish in Copeland 2006, pp. 269–277
• Ellsbury, Graham (1998a), Description of the Enigma Machine, The Enigma Machine: Its Construction, Operation and Complexity (published 1998), retrieved 21 January 2009
• Ellsbury, Graham (1998b), "The Turing Bombe: What it was and how it worked", in Ellsbury, Graham (ed.), The Enigma and the Bombe
• Enever, Ted (1999), Britain's Best Kept Secret: Ultra's Base at Bletchley Park (3rd ed.), Gloucestershire: Sutton, ISBN 978-07509-2355-2 – A guided tour of the history and geography of the Park, written by one of the founder members of the Bletchley Park Trust
• Erskine, Ralph (1999), "The Holden Agreement on Naval Sigint: The First BRUSA?", Intelligence and National Security, 14 (2): 187–189, doi:10.1080/02684529908432545
• Erskine, Ralph (2006), "The Poles Reveal their Secrets: Alastair Denniston's Account of the July 1939 Meeting at Pyry", Cryptologia, vol. 30, no. 4, pp. 294–305, doi:10.1080/01611190600920944, S2CID 13410460
• Erskine, Ralph; Smith, Michael, eds. (2011), The Bletchley Park Codebreakers, Biteback Publishing Ltd, ISBN 978-184954078-0 Updated and extended version of Action This Day: From Breaking of the Enigma Code to the Birth of the Modern Computer Bantam Press 2001
• Fahie, J. J. (1884), A History of Electric Telegraphy to the year 1837 (PDF), London: E. & F. N. Spon
• Farley, Robert D. (1990), Oral History Interview NSA-OH-14-83 Campaigne, Howard, Dr. 29 June 1983 (PDF), US National Security Agency, retrieved 3 January 2014
• Fensom, Harry (2006), How Colossus was built and Operated in Copeland 2006, pp. 297–304
• Ferris, John Robert (2005), Intelligence and strategy: selected essays (illustrated ed.), Routledge, ISBN 9780415361941
• Flowers, T. H. (1983), "The Design of Colossus", Annals of the History of Computing, 5 (3): 239–252, doi:10.1109/MAHC.1983.10079, S2CID 39816473
• Flowers, Thomas H. (2006), Colossus in Copeland 2006, pp. 91–100
• Freebody, J. W. (1959), "Historical Survey of Telegraphy", Telegraphy, London: Sir Isaac Pitman & Sons, Ltd.
• Fried, Walter (1945), Cpt, Walter Fried's Fish Notes, March 1944 to Jan 1945: Annex to #F 71: Elementary Screed on Delta D Counts and Colossus Runs
• Gaj, Kris; Orłowski, Arkadiusz, Facts and myths of Enigma: breaking stereotypes (PDF), George Mason University, Fairfax, VA 22030, U.S.A.; Institute of Physics, Polish Academy of Sciences Warszawa, Poland, retrieved 1 February 2009
• Gannon, James (2002), Stealing Secrets, Telling Lies: How Spies and Codebreakers Helped Shape the Twentieth Century, Washington, D.C.: Brassey's, ISBN 978-1574883671
• Gannon, Paul (2007) [2006], Colossus: Bletchley Park's Greatest Secret, London: Atlantic Books, ISBN 978-1-84354-331-2
• Gillogly, James J. (1995), "Ciphertext-only Cryptanalysis of Enigma", Cryptologia, vol. 19, no. 4 (published October 1995), pp. 405–412, doi:10.1080/0161-119591884060, retrieved 1 February 2009
• Good, Jack; Michie, Donald; Timms, Geoffrey (1945), General Report on Tunny: With Emphasis on Statistical Methods, UK Public Record Office HW 25/4 and HW 25/5, archived from the original on 17 September 2010, retrieved 15 September 2010 That version is a facsimile copy, but there is a transcript of much of this document in '.pdf' format at: Sale, Tony (2001), Part of the "General Report on Tunny", the Newmanry History, formatted by Tony Sale (PDF), retrieved 20 September 2010, and a web transcript of Part 1 at: Ellsbury, Graham, General Report on Tunny With Emphasis on Statistical Methods, retrieved 3 November 2010
• Good, I. J. (1979), "Early Work on Computers at Bletchley", IEEE Annals of the History of Computing, 1 (1): 38–48, doi:10.1109/MAHC.1979.10011, S2CID 22670337
• Good, I. J., Pioneering Work on Computers at Bletchley (in Nicholas Metropolis, J. Howlett, Gian-Carlo Rota, (editors), A History of Computing in the Twentieth Century, Academic Press, New York, 1980)
• Good, Jack (1993), Enigma and Fish in Hinsley & Stripp 1993, pp. 149–166
• Haigh, Thomas (2017), "Colossal Genius: Tutte, Flowers, and a Bad Imitation of Turing", Communications of the ACM, 60 (1): 29–35, doi:10.1145/3018994, S2CID 41650745
• Halton, Ken (1993), The Tunny Machine in Hinsley & Stripp 1993, pp. 167–174
• Harper, John (2008), The British Bombe: CANTAB The Rebuild Project, retrieved 1 May 2010
• Herivel, John (2008), Herivelismus and the German Military Enigma, Cleobury Mortimer, Shropshire: M & M Baldwin, ISBN 978-0947712464 This contains an account of the pre-war work on Enigma in Poland, written with the care of a professional historian.
• Hill, Marion (2004), Bletchley Park People, Stroud, Gloucestershire: The History Press, ISBN 978-0-7509-3362-9
• Hilton, Peter (1988), Reminiscences of Bletchley Park, 1942–1945 (PDF), pp. 291–301, retrieved 2009-09-13 (CAPTCHA) (10-page preview from A Century of mathematics in America, Volume 1 By Peter L. Duren, Richard Askey, Uta C. Merzbach, see http://www.ams.org/bookstore-getitem/item=HMATH-1 ; ISBN 978-0-8218-0124-6
• Hilton, Peter (2006), Living with Fish: Breaking Tunny in the Newmanry and the Testery in Copeland 2006, pp. 189–203
• Hinsley, F.H.; Ransom, C.F.G.; Knight, R.C.C. (1988), British Intelligence in the Second World War: Volume 3, Part 2: v. 3, Cambridge: Cambridge University Press, ISBN 978-0521351966
• Hinsley, F.H.; Stripp, Alan, eds. (1993) [1992], Codebreakers: The inside story of Bletchley Park, Oxford: Oxford University Press, ISBN 978-0-19-280132-6
• Hinsley, F.H. (1993), Introduction: The influence of Ultra in the Second World War in Hinsley & Stripp 1993, pp. 1–13
• Hinsley, Harry (1996) [1993], The Influence of ULTRA in the Second World War Transcript of a lecture given on Tuesday 19 October 1993 at Cambridge University
• Hodges, Andrew (1992), Alan Turing: The Enigma, London: Vintage, ISBN 978-0099116417
• Hodges, Andrew (1995), Alan Turing: a short biography: Part 4 The Second World War, Alan Turing: a short biography, retrieved 23 October 2008
• Horwood, D C, A technical description of COLOSSUS I, August 1973, PRO HW 25/24.
• Huttenhain, Orr; Fricke (1945), OKW/Chi Cryptanalytic Research on Enigma, Hagelin and Cipher Teleprinter Messages, TICOM

I-M

• Jacobsen, Philip H. (2000), British provision of German naval Enigma information, retrieved 26 March 2010
• James, Ioan (2005), Asperger's Syndrome and High Achievement: Some Very Remarkable People, Jessica Kingsley, ISBN 978-1843103882
• Jones, R. V. (1978), Most Secret War, London: Book Club Associates, ISBN 978-0-241-89746-1
• Kahn, David (1991), Seizing the Enigma: The Race to Break the German U-boat Codes, 1939-1943, New York: Houghton Mifflin Co., ISBN 978-0395427392
• Kahn, David (1996), The Codebreakers: The Comprehenisve History of Secret Communication from Ancient Times to the Internet, New York: Scribner, ISBN 0684831309
• Kenyon, David (16 July 2019), Bletchley Park and D-Day: The Untold Story of How the Battle for Normandy Was Won, Yale University Press, ISBN 978-0-300-24357-4
• Keen, John (2003), Harold 'Doc' Keen and the Bletchley Park Bombe, Cleobury Mortimer, Shropshire: M & M Baldwin, ISBN 978-0-947712-42-6
• Kozaczuk, Władysław (1984), Enigma: How the German Machine Cipher was Broken, and how it was Read by the Allies in World War Two, edited and translated by Christopher Kasparek (2 ed.), Frederick, Maryland: University Publications of America, ISBN 978-0890935477 A revised and augmented translation of W kręgu enigmy, Warsaw, Książka i Wiedza, 1979, supplemented with appendices by Marian Rejewski and others.
• Kozaczuk, Władysław; Straszak, Jerzy (2004), Enigma: How the Poles Broke the Nazi Code, New York: Hippocrene Books, ISBN 978-0781809412 Largely an abridgment of Kozaczuk 1984, minus Rejewski's appendices, which have been replaced with appendices of varying quality by other authors
• Large, Christine (2003), Hijacking Enigma: The Insider's Tale, John Wiley, ISBN 978-0470863466
• Large, Christine, Some Human Factors in Codebreaking (PDF), retrieved 30 May 2011
• Lewin, Ronald (2001) [1978], Ultra Goes to War: The Secret Story, Classic Military History (Classic Penguin ed.), London, England: Hutchinson & Co, ISBN 978-1566492317
• Loewe, Michael (1993), Japanese naval codes in Hinsley & Stripp 1993, pp. 257–263
• Luke, Doreen (2005) [2003], My Road to Bletchley Park (3rd ed.), Cleobury Mortimer, Shropshire: M & M Baldwin, ISBN 978-0-947712-44-0
• Mahon, A.P. (1945), The History of Hut Eight 1939 - 1945, UK National Archives Reference HW 25/2, retrieved 10 December 2009
• Manning, Mick; Granström, Brita (2010), Taff in the WAAF, Frances Lincoln Children's Books, ISBN 978-1-84780-093-0
• Marks, Philip (2001), "Umkehrwalze D: Enigma's Rewirable Reflector—Part I", Cryptologia, 25 (2): 101–141, doi:10.1080/0161-110191889842, S2CID 11111300
• Marks, Philip (2001), "Umkehrwalze D: Enigma's Rewirable Reflector—Part II", Cryptologia, 25 (3): 177–212, doi:10.1080/0161-110191889888, S2CID 44802514
• Marks, Philip (2001), "Umkehrwalze D: Enigma's Rewirable Reflector—Part III", Cryptologia, 25 (4): 296–310, doi:10.1080/0161-110191889941, S2CID 29659440
• Meyer, Joseph A. (2007), Der Fall WICHTER: German Knowledge of Polish Success on ENIGMA (PDF), Declassified and approved for release by NSA on 10-31-2007, vol. DOCID: 3838699, NSA
• McKay, Sinclair (2010), The Secret Life of Bletchley Park: The WWII Codebreaking Centre and the men and women who worked there, London: Aurum Press, ISBN 978-1-84513-539-3
• Michie, Donald (2006), Codebreaking and Colossus in Copeland 2006, pp. 223–246
• Miller, A. Ray (2001), The Cryptographic Mathematics of Enigma, Center for Crypologic History, retrieved 1 February 2009
• Millward, William (1993), Life in and out of Hut 3 in Hinsley & Stripp 1993, pp. 17–29
• Milner-Barry, Stuart (1993), Navy Hut 6: Early days in Hinsley & Stripp 1993, pp. 89–99
• Morris, Christopher (1993), Navy Ultra's Poor Relations in Hinsley & Stripp 1993, pp. 231–245
• Murray, Joan (1993), Hut 8 and naval Enigma, Part I in Hinsley & Stripp 1993, pp. 113–118

N-R

• Nelson, Eric L. (September 2018), "The peripheral and central indexes at Bletchley Park during the Second World War", The Indexer, 36 (3): 95–101
• Oakley, Brian, ed. (2006), The Bletchley Park War Diaries: July 1939 — August 1945 (2.6 ed.), Wynne Press
• Parrish, Thomas (1986), The Ultra Americans: The U.S. Role in Breaking the Nazi Codes, New York: Stein and Day, ISBN 0-8128-3072-5
• Perera, Tom, Story of Enigma: History, Technology and Deciphering, Ian Allan Publishing, ISBN 9780711035270
• Putney, Diane T. (1987), ULTRA and the Army Air Forces in World War II: An Interview with Associate Justice of the U. S. Supreme Court Lewis F. Powell, USAF Warrior Studies, Washington, D. C.: Office of Air Force History United States Air Force, ISBN 0-912799-45-5
• Quirantes, Arturo. "Model Z: A Numbers-Only Enigma Version", Cryptologia 28(2), April 2004.
• Randell, Brian, Colossus: Godfather of the Computer, 1977 (reprinted in The Origins of Digital Computers: Selected Papers, Springer-Verlag, New York, 1982)
• Randell, Brian (1980), "The Colossus" (PDF), in Metropolis, N.; Howlett, J.; Rota, Gian-Carlo (eds.), A History of Computing in the Twentieth Century, pp. 47–92, ISBN 978-0124916500, archived from the original (PDF) on 2011-07-22
• Reeds, James A.; Whitfield, Diffie; Field, J.V. (2015). Breaking Teleprinter Ciphers at Bletchley Park An edition of: I.J Good, D. Michie, G. Timms: General report on Tunny: With Emphasis on Statistical Methods (1945). Wiley-IEEE Press. ISBN 978-0-470-46589-9.
• Rejewski, Marian (1942), Sprawozdanie z prac kryptologicznych nad niemieckim szyfrem maszynowym Enigma (Report of Cryptologic Work on the German Enigma Machine Cipher) (in Polish) Manuscript written at Uzès, France
• Rejewski, Marian (1967), Wspomnienia z mej pracy w Biurze Szyfrów Oddziału II Sztabu Głównego 1932–1945 (Memoirs of My Work in the Cipher Bureau of Section II of the [Polish] General Staff) (in Polish) Manuscript
• Rejewski, Marian (1980), "An Application of the Theory of Permutations in Breaking the Enigma Cipher", Applicationes Mathematicae, 16 (4): 543–559, doi:10.4064/am-16-4-543-559, ISSN 1730-6280
• Rejewski, Marian (1981), "How Polish Mathematicians Deciphered the Enigma" (PDF), IEEE Annals of the History of Computing, 3 (3): 213–234, doi:10.1109/MAHC.1981.10033, S2CID 15748167
• Rejewski, Marian (1982), "Remarks on Appendix 1 to British Intelligence in the Second World War by F.H. Hinsley," translated by Christopher Kasparek", Cryptologia, vol. 6, no. 1 (published January 1982), pp. 75–83, doi:10.1080/0161-118291856867
• Rejewski, Marian; Woytak, Richard (1984b), A Conversation with Marian Rejewski Appendix B of Kozaczuk 1984, pp. 229–40
• Rejewski, Marian (1984c), Summary of Our Methods for Reconstructing ENIGMA and Reconstructing Daily Keys, and of German Efforts to Frustrate Those Methods Appendix C of Kozaczuk 1984, pp. 241–245
• Rejewski, Marian (1984d), How the Polish Mathematicians Broke Enigma Appendix D of Kozaczuk 1984, pp. 246–271
• Rejewski, Marian (1984e), The Mathematical Solution of the Enigma Cipher Appendix E of Kozaczuk 1984, pp. 272–291
• Rezabek, Randy (2017), TICOM: the Hunt for Hitler's Codebreakers, Independently published, ISBN 978-1521969021
• Roberts, Jerry (2006), "Major Tester's Section", Colossus: The Secrets of Bletchley Park's Codebreaking Computers in Copeland 2006, pp. 249–259
• Roberts, Jerry (2009), My Top-Secret Codebreaking During World War II: The Last British Survivor of Bletchley Park's Testery (iTunes U) (video), University College London
• Roberts, Jerry (2017), Lorenz: Breaking Hitler's top secret code at Bletchley Park, Stroud, Gloucestershire: The History Press, ISBN 978-0-7509-7885-9
• Roberts, Steven, Distant Writing
• Rojas, R., Hashagen U., (eds.): The First Computers: History and Architectures. MIT Press 2000. ISBN-10:0-262-18197-5.

S-Z

• Sale, Tony (2000), "The Colossus of Bletchley Park - The German Cipher System", in Rojas, Raúl; Hashagen, Ulf (eds.), The First Computers: History and Architecture, Cambridge, Massachusetts: The MIT Press, pp. 351–364, ISBN 0-262-18197-5
• Sale, Tony (2004) [1998], The Colossus Computer 1943–1996 and how it helped to break the German Lorenz cipher in WWII, Cleobury Mortimer: M & M Baldwin, ISBN 0-947712-36-4
• Sale, Tony, "The difficulties in breaking German Naval Enigma: Turing's Work", Bigrams, Trigrams and Naval Enigma, retrieved 26 November 2009
• Sale, Tony (2008). "Video of Tony Sale talking about rebuilt Colossus 2008-6-19". Retrieved 13 May 2017.
• Sebag-Montefiore, Hugh (2004) [2000], Enigma: The Battle for the Code (Cassell Military Paperbacks ed.), London: Weidenfeld & Nicolson, ISBN 978-0297842514
• Singh, Simon (1999), The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography, London: Fourth Estate, ISBN 1-85702-879-1
• Small, Albert W. (December 1944), The Special Fish Report, The American National Archive (NARA) College Campus Washington{{citation}}: CS1 maint: date and year (link) CS1 maint: location missing publisher (link)
• Smith, Michael (2000), The Emperor's Codes: Bletchley Park and the breaking of Japan's secret ciphers, Bantam Press, ISBN 0593-046412
• Smith, Michael (2006), "How it began: Bletchley Park Goes to War", in Copeland, B Jack (ed.), Colossus: The Secrets of Bletchley Park's Codebreaking Computers, Oxford: Oxford University Press, ISBN 978-0-19-284055-4
• Smith, Michael (2007) [1998], Station X: The Codebreakers of Bletchley Park, Pan Grand Strategy Series (Pan Books ed.), London: Pan McMillan Ltd, ISBN 978-0-330-41929-1
• Sullivan, Geoff; Weierud, Frode (2005), "Breaking German Army Ciphers" (PDF), Cryptologia, vol. 24, no. 3, pp. 193–232, retrieved 16 October 2008
• Taunt, Derek (1993), Hut 6: 1941-1945 in Hinsley & Stripp 1993, pp. 100–112
• Turing, Alan M. (1936), "On Computable Numbers, with an Application to the Entscheidungsproblem", Proceedings of the London Mathematical Society, 2, vol. 42 (published 1937), pp. 230–265, doi:10.1112/plms/s2-42.1.230 (and Turing, Alan M. (1938), "On Computable Numbers, with an Application to the Entscheidungsproblem. A correction", Proceedings of the London Mathematical Society, 2, vol. 43, no. 6 (published 1937), pp. 544–546, doi:10.1112/plms/s2-43.6.544)
• Turing, Alan (1940), Erskine, Ralph; Marks, Philip; Weierud, Frode (eds.), Turing's Treatise on Enigma (The Prof's Book), retrieved 1 February 2009
• Turing, Alan (c. 1941), "Memorandum to OP-20-G on Naval Enigma", in Copeland, B. Jack (ed.), The Essential Turing: Seminal Writings in Computing, Logic, Philosophy, Artificial Intelligence, and Artificial Life plus The Secrets of Enigma, Oxford: Oxford University Press, pp. 341–352, ISBN 0-19-825080-0
• Tutte, W. T. (19 June 1998), Fish and I (PDF), retrieved 7 April 2012 Transcript of a lecture given by Prof. Tutte at the University of Waterloo
• Turing, Alan M. (1945), Report by Dr. A.M. Turing on proposals for the development of an Automatic Computing Engine (ACE): Submitted to the Executive Committee of the NPL in February 1946 reprinted in Copeland 2005, pp. 369–454
• Tutte, William T. (2006), My Work at Bletchley Park Appendix 4 in Copeland 2006, pp. 352–369
• Twinn, Peter (1993), The Abwehr Enigma in Hinsley & Stripp 1993, pp. 123–131
• Ulbricht, Heinz. Enigma Uhr, Cryptologia, 23(3), April 1999, pp. 194–205.
• US Army (1945), "The US 6812 Division Bombe Report Eastcote 1944", Tony Sale's Codes and Ciphers, retrieved 1 May 2010
• Ward, Mark (27 May 2011), Code-cracking machine returned to life, BBC News{{citation}}: CS1 maint: date and year (link)
• Ward, Mark (5 May 2014), How GCHQ built on a colossal secret, BBC News{{citation}}: CS1 maint: date and year (link)
• Welchman, Gordon (1984) [1982], The Hut Six story: Breaking the Enigma codes, Harmondsworth, England: Penguin Books, ISBN 0-14-00-5305-0 An early publication containing several misapprehensions that are corrected in an addendum in the 1997 edition.
• Welchman, Gordon (1997) [1982], The Hut Six story: Breaking the Enigma codes, Cleobury Mortimer, England: M&M Baldwin, ISBN 9780947712341 New edition updated with an addendum consisting of a 1986 paper written by Welchman that corrects his misapprehensions in the 1982 edition.
• Welchman, Gordon (1986), "From Polish Bomba to British Bombe: the Birth of Ultra", Intelligence and National Security, 1 (1), Ilford, England: Frank Cass & Company: 71–110, doi:10.1080/02684528608431842 This is reproduced as an addendum in the 1997 edition of Welchman's 'The Hut Six Story'.
• Welchman, Gordon (2008) [1986], "From Polish Bomba to British Bombe: the Birth of Ultra", in Andrew, Christopher M. (ed.), Codebreaking and signals intelligence: Volume 1 of Intelligence and national security, The University of Virginia: F. Cass, ISBN 9780714632995
• Wells, B (2004), "A Universal Turing Machine Can Run on a Cluster of Colossi", Abstracts of the American Mathematical Society, 25: 441
• Wenger, J. N.; Engstrom, H. T.; Meader, R. I. (1998) [1944], History of The Bombe Project: Memorandum for the Director of Naval Communications, The Mariner's Museum
• Wenger, J. N. (1945), "Appendix II: U. S. Army Cryptanalytic Bombe", Solving the Enigma: History of the Cryptanalytic Bombe, a NSA phamphlet, retrieved 9 April 2010 (also National Archives and Records Administration Record Group 457, File 35701.)
• Wilcox, Jennifer E (2001), "About the Enigma", Solving the Enigma: History of the Cryptanalytic Bombe, a NSA phamphlet, Center for Cryptologic History, National Security Agency, retrieved 9 April 2010 ASIN: B0006RLRA4
• Winterbotham, F.W. (2000) [1974], The Ultra secret: the inside story of Operation Ultra, Bletchley Park and Enigma, London: Orion Books Ltd, ISBN 9780752837512, OCLC 222735270
• Woytak, Richard (1988), "Colonel Kowalewski and the Origins of Polish Code Breaking and Communication Interception", East European Quarterly, XXI (4), Boulder: University of Colorado: 497–500, ISSN 0012-8449
• Zuse, Konrad (2010) [1984], The Computer – My Life Translated by McKenna, Patricia and Ross, J. Andrew from: Der Computer, mein Lebenswerk (1984) (in English translated from German), Berlin/Heidelberg: Springer-Verlag, ISBN 978-3-642-08151-4{{citation}}: CS1 maint: unrecognized language (link)