Two Influential British World War 2 Technologies Aram Soultanian
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How I Learned to Stop Worrying and Love the Bombe: Machine Research and Development and Bletchley Park
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CURVE/open How I learned to stop worrying and love the Bombe: Machine Research and Development and Bletchley Park Smith, C Author post-print (accepted) deposited by Coventry University’s Repository Original citation & hyperlink: Smith, C 2014, 'How I learned to stop worrying and love the Bombe: Machine Research and Development and Bletchley Park' History of Science, vol 52, no. 2, pp. 200-222 https://dx.doi.org/10.1177/0073275314529861 DOI 10.1177/0073275314529861 ISSN 0073-2753 ESSN 1753-8564 Publisher: Sage Publications Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it. Mechanising the Information War – Machine Research and Development and Bletchley Park Christopher Smith Abstract The Bombe machine was a key device in the cryptanalysis of the ciphers created by the machine system widely employed by the Axis powers during the Second World War – Enigma. -
Stdin (Ditroff)
Notes to accompany four Alan Turing videos 1. General The recent (mid-November 2014) release of The Imitation Game movie has caused the com- prehensive Alan Hodges biography of Turing to be reprinted in a new edition [1]. This biog- raphy was the basis of the screenplay for the movie. A more recent biography, by Jack Copeland [2], containing some new items of information, appeared in 2012. A more techni- cal work [3], also by Jack Copeland but with contributed chapters from other people, appeared in 2004. 2. The Princeton Years 1936–38. Alan Turing spent the years from 1936–38 at Princeton University studying mathematical logic with Prof. Alonzo Church. During that time Church persuaded Turing to extend the Turing Machine ideas in the 1936 paper and to write the results up as a Princeton PhD. You can now obtaing a copy of that thesis very easily [4] and this published volume contains extra chapters by Andrew Appel and Solomon Feferman, setting Turing’s work in context. (Andrew Appel is currently Chair of the Computer Science Dept. at Princeton) 3. Cryptography and Bletchley park There are many texts available on cryptography in general and Bletchley Park in particu- lar. A good introductory text for the entire subject is “The Code Book” by Simon Singh [5] 3.1. Turing’s Enigma Problem There are now a large number of books about the deciphering of Enigma codes, both in Hut 6 and Hut 8. A general overview is given by “Station X” by Michael Smith [6] while a more detailed treatment, with several useful appendices, can be found in the book by Hugh Sebag-Montefiore [7]. -
Economic-Impact-Of-University-Of-Birmingham-Full-Report.Pdf
The impact of the University of Birmingham April 2013 The impact of the University of Birmingham A report for the University of Birmingham April 2013 The impact of the University of Birmingham April 2013 Contents Executive Summary ...................................................................................... 3 1 Introduction ..................................................................................... 7 2 The University as an educator ........................................................ 9 3 The University as an employer ..................................................... 19 4 The economic impact of the University ....................................... 22 5 The University as a research hub ................................................. 43 6 The University as an international gateway ................................. 48 7 The University as a neighbour ...................................................... 56 Bibliography ................................................................................................ 67 2 The impact of the University of Birmingham April 2013 Executive Summary The University as an educator... The University of Birmingham draws students from all over the UK and the rest of the world to study at its Edgbaston campus. In 2011/12, its 27,800 students represented over 150 nationalities . The attraction of the University led over 20,700 students to move to or remain in Birmingham to study. At a regional level, it is estimated that the University attracted 22,400 people to either move to, -
Polish Mathematicians Finding Patterns in Enigma Messages
Fall 2006 Chris Christensen MAT/CSC 483 Machine Ciphers Polyalphabetic ciphers are good ways to destroy the usefulness of frequency analysis. Implementation can be a problem, however. The key to a polyalphabetic cipher specifies the order of the ciphers that will be used during encryption. Ideally there would be as many ciphers as there are letters in the plaintext message and the ordering of the ciphers would be random – an one-time pad. More commonly, some rotation among a small number of ciphers is prescribed. But, rotating among a small number of ciphers leads to a period, which a cryptanalyst can exploit. Rotating among a “large” number of ciphers might work, but that is hard to do by hand – there is a high probability of encryption errors. Maybe, a machine. During World War II, all the Allied and Axis countries used machine ciphers. The United States had SIGABA, Britain had TypeX, Japan had “Purple,” and Germany (and Italy) had Enigma. SIGABA http://en.wikipedia.org/wiki/SIGABA 1 A TypeX machine at Bletchley Park. 2 From the 1920s until the 1970s, cryptology was dominated by machine ciphers. What the machine ciphers typically did was provide a mechanical way to rotate among a large number of ciphers. The rotation was not random, but the large number of ciphers that were available could prevent depth from occurring within messages and (if the machines were used properly) among messages. We will examine Enigma, which was broken by Polish mathematicians in the 1930s and by the British during World War II. The Japanese Purple machine, which was used to transmit diplomatic messages, was broken by William Friedman’s cryptanalysts. -
Blue Plaque Guide
Blue Plaque Guide Research and Cultural Collections 2 Blue Plaque Guide Foreword 3 Introduction 4 1 Dame Hilda Lloyd 6 2 Leon Abrams and Ray Lightwood 7 3 Sir Norman Haworth 8 4 Sir Peter Medawar 9 5 Charles Lapworth 10 6 Frederick Shotton 11 7 Sir Edward Elgar 12 8 Sir Granville Bantock 13 9 Otto Robert Frisch and Sir Rudolf E Peierls 14 10 John Randall and Harry Boot 15 11 Sir Mark Oliphant 16 12 John Henry Poynting 17 13 Margery Fry 18 14 Sir William Ashley 19 15 George Neville Watson 20 16 Louis MacNeice 21 17 Sir Nikolaus Pevsner 22 18 David Lodge 23 19 Francois Lafi tte 24 20 The Centre for Contemporary Cultural Studies 25 21 John Sutton Nettlefold 26 22 John Sinclair 27 23 Marie Corelli 28 Acknowledgments 29 Visit us 30 Map 31 Blue Plaque Guide 3 Foreword Across the main entrance to the Aston Webb Building, the historic centre of our campus, is a line of standing male figures carved into the fabric by Henry Pegram. If this were a cathedral, they would be saints or prophets; changed the world, from their common home the University but this is the University of Birmingham, and the people of Birmingham. who greet us as we pass through those doors are Beethoven, Virgil, Michelangelo, Plato, Shakespeare, The University’s Research and Cultural Collections, Newton, Watt, Faraday and Darwin. While only one of working with Special Collections, the Lapworth Museum, those (Shakespeare) was a local lad, and another (Watt) the Barber Institute of Fine Arts and Winterbourne House local by adoption, together they stand for the primacy of and Garden, reflect the cross-disciplinary nature of the creativity. -
History Today 12 June 2018: Back to Basics
Back to Basics June 12 The CCH has seen a few instances recently where published histories on the outside that deal with World War II cryptology have used WW II cryptologic terminology incorrectly or made other erroneous statements about the wartime effort. We decided it would be a good idea to lay out some terminology and basic facts for reference. If all this sounds like a primer, well, yes, it is. But we hope it is also an interesting primer. Both the United States and Great Britain had intensive cryptanalytic efforts before World War II, and both enjoyed a measure of success. Although both countries worked a variety of targets, the British concentrated on German cryptosystems, and the U.S. on Japanese systems. Each gave a covername to the systems they sought to solve, and, when successful against an adversary’s system, they applied a different covername to the results of the cryptanalysis. The Americans and British began cautious sharing in early 1941 of what the British called Signals Intelligence (SIGINT) and U.S. officials called Communications Intelligence (COMINT). Over the course of the war, just as the two nations grew closer in military operations, their cryptologic organizations greatly increased cooperation. Both countries had a covername that was applied to the information derived from exploiting a foreign cryptosystem. This had a double purpose; it would help keep the intelligence information within carefully controlled distribution system, and it would alert the reader to the fact that the intelligence had been obtained through an extremely fragile process and could only be discussed with others who held the proper clearances for that kind of intelligence. -
David Charlton… Supersymmetry
150 buzz June/July 2014 Pioneering Physics 2 VICE-PRINCIPAL'S VIEW FEATURE: EPS Provost’s view Our Chancellors have always been an integral part of the fabric of University life Provost and Vice-Principal, Professor Adam Tickell As you will already know, Lord (Karan) Eden was the last of our Chancellors Bilimoria is to be the University of to have a political career, but not the last to YOUR BUZZ Birmingham’s seventh Chancellor. make a contribution to public life. Sir Peter The Chancellor is unpaid and the Scott (1973–83) was a founder of the Next edition 6 August 2014 responsibilities are simply to confer degrees World Wide Fund for Nature and the Copy deadline 11 July 2014 and chair the Annual Meeting of Court. Slimbridge wetlands sanctuary. Sir Alex However, whilst each has defined the Jarratt (1983–2002) had a distinguished Contact us [email protected] role differently, our Chancellors have always career in business but is best known been an integral part of the fabric of for authoring an inquiry into higher Buzz online University life. The first, Joseph Chamberlain, education that – whilst controversial at buzz.bham.ac.uk was probably England’s finest local the time – helped lay the foundations for politician and was the driving force behind the internationally recognised excellence Follow us on Twitter our foundation. The University, he said, of British universities that we take for twitter.com/buzzunibham would be: ‘A school of universal instruction, granted today. Find us on Facebook not confined to any particular knowledge Sir Dominic Cadbury (2002–2013) facebook.com/buzzunibham but taking all knowledge in its province. -
Gordon Welchman: Bletchley Parks Architect of Ultra Intelligence Pdf, Epub, Ebook
GORDON WELCHMAN: BLETCHLEY PARKS ARCHITECT OF ULTRA INTELLIGENCE PDF, EPUB, EBOOK Joel Greenberg | 288 pages | 02 Feb 2016 | Pen & Sword Books Ltd | 9781848327528 | English | Barnsley, United Kingdom Gordon Welchman: Bletchley Parks Architect of Ultra Intelligence PDF Book Book Description Frontline, London, McMillan , Hardcover 5. Replies 1 Views He began to ask for advice about publishing a more complete account and sought access to GCHQ documents. Media Test New media New comments Search media. This machine was developed in order to produce a systematic analysis of decrypted messages. These cookies are used to make advertising messages more relevant to you. Brand new Book. His book, The Hut Six Story, was the first to reveal not only how they broke the codes, but how it was done on an industrial scale. Search forums. New Posts. Gordon Welchman: Bletchley Park? In a personal paper titled A Personal Record , written shortly before his death in , Welchman stated:. Latest: Cregg Bristle 3 minutes ago. Gordon Welchman was one of the Park's most important figures. The book has a good selection of well reproduced black and white photographs. Book Description Frontline, London, Like Turing, his pioneering work was fundamental to the success of Bletchley Park and helped pave the way for the birth of the digital age. It will require some mathematical back ground to understand this part of the book. The intercepted German army and air force messages were decrypted in Huts 6 and 3; the navy messages which were encrypted with a different Enigma machine in Huts 8 and 4. Author copepod Creation date 9 Apr Tags bletchley park code breaking gordon welchman. -
The Cavity Magnetron
TRANSMISSION LINES THE JOURNAL OF THE DEFENCE ELECTRONICS HISTORY SOCIETY www.dehs.org.uk; ISSN 1362-3834 Volume 22 Number 3 Editor: Peter Butcher September 2017 DEHS Award Winner Major Anthony Glover with judging team – Peter Hill, Peter Butcher, Dick Green & Tony Jones (Photo: Dick Green) DEHS BEST PRESENTATION AWARD TO MESE STUDENT As has happened since 2007, we were invited to judge “Best presentation” at the MESE 31 project presentation event on 27th July. This year, there were four judges: Peter Butcher, Dick Green, Peter Hill and Tony Jones. There were eleven students from Australia, India, Italy and the UK. As usual, the projects ranged across radar, communications and electronic warfare systems, flavoured in some cases by laser data links, unmanned air vehicles (UAVs) and innovative materials. Many of the devices and systems could provide solutions to current and future defence requirements. We assigned scores against “audience rapport”, “audio visual use”, “clarity of subject”, “structure” and “end summary” criteria, in order to rank the presentations. We also considered how the speakers handled questions. This year, four presentations stood out and we had to reach consensus on a single winner very quickly. By some mysterious process, we agreed that the winner was Major Anthony Glover for his presentation on The use of low cost software defined radio systems to detect transient 4G mobile phone uplink transmissions in order to identify and classify the user activity. Dick Green then handed over a cheque for £200 to Major Glover and informed him that, as part of the award, he would be given honorary membership of DEHS for one year. -
Cavity Magnetron 1 Cavity Magnetron
Cavity magnetron 1 Cavity magnetron The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field. The 'resonant' cavity magnetron variant of the earlier magnetron tube was invented by John Randall and Harry Boot in 1940 at the University of Birmingham, England.[1] The high power of pulses from the cavity magnetron made centimeter-band radar practical, with shorter wavelength radars allowing detection of smaller objects. The compact cavity magnetron tube drastically reduced the size of radar sets[2] so that they could be installed in anti-submarine aircraft[3] and Magnetron with section removed to exhibit the escort ships.[2] At present, cavity magnetrons are commonly used in cavities. The cathode in the center is not visible. The waveguide emitting microwaves is at the left. microwave ovens and in various radar applications.[4] The magnet producing a field parallel to the long axis of the device is not shown. Construction and operation All cavity magnetrons consist of a hot cathode with a high (continuous or pulsed) negative potential created by a high-voltage, direct-current power supply. The cathode is built into the center of an evacuated, lobed, circular chamber. A magnetic field parallel to the filament is imposed by a permanent magnet. The magnetic field causes the electrons, attracted to the (relatively) positive outer part of the chamber, to spiral outward in a circular path rather, a consequence of the Lorentz force. Spaced around the rim of the chamber are cylindrical A similar magnetron with a different section cavities. -
Breaking Enigma Samantha Briasco-Stewart, Kathryn Hendrickson, and Jeremy Wright
Breaking Enigma Samantha Briasco-Stewart, Kathryn Hendrickson, and Jeremy Wright 1 Introduction 2 2 The Enigma Machine 2 2.1 Encryption and Decryption Process 3 2.2 Enigma Weaknesses 4 2.2.1 Encrypting the Key Twice 4 2.2.2 Cillies 5 2.2.3 The Enigma Machine Itself 5 3 Zygalski Sheets 6 3.1 Using Zygalski Sheets 6 3.2 Programmatic Replication 7 3.3 Weaknesses/Problems 7 4 The Bombe 8 4.1 The Bombe In Code 10 4.1.1 Making Menus 10 4.1.2 Running Menus through the Bombe 10 4.1.3 Checking Stops 11 4.1.4 Creating Messages 11 4.1.5 Automating the Process 11 5 Conclusion 13 References 14 1 Introduction To keep radio communications secure during World War II, forces on both sides of the war relied on encryption. The main encryption scheme used by the German military for most of World War II employed the use of an Enigma machine. As such, Britain employed a large number of codebreakers and analysts to work towards breaking the Enigma-created codes, using many different methods. In this paper, we lay out information we learned while researching these methods, as well as describe our attempts at programatically recreating two methods: Zygalski sheets and the Bombe. 2 The Enigma Machine The Enigma machine was invented at the end of World War I, by a German engineer named Arthur Scherbius. It was commercially available in the 1920s before being adopted by the German military, among others, around the beginning of World War II. -
Constantly Questioning
OVER 100 YEARS OF RESEARCH THAT MATTERS 1 For more than 100 years, a strong civic mission has underpinned research at the University of Birmingham, making a powerful contribution not only to our city, region and nation but also extending across the globe. We are immensely proud of our achievements and I am delighted to present highlights of the exciting work taking place at Birmingham. As we look to the future, I warmly invite you to join our quest to think in original ways, to seek different paths and to ask the most pertinent questions. Professor Sir David Eastwood Vice -Chancellor of the University of Birmingham 2 Research that matters The University of Birmingham is a founder member of the At the heart of our research are the brilliant people who deliver it: Russell Group of research -intensive universities in the UK and is researchers – from postgraduate research student to professor – ranked a top 100 university in the world. We have established a who have come to Birmingham from more than 100 countries powerful reputation, since our foundation in 1900, for both high - to form a creative, ambitious and inclusive research community. quality fundamental research and research that addresses the Our outstanding technical support staff are an important part needs and challenges of our time. of that research community too. In the last three years, we have placed particular emphasis on enhancing the research environment The driving force of our strategy is ‘Research that Matters’. and culture, building critical mass, encouraging those ‘fzzy ’ Research can only matter if it is of value to others – not just those conversations, valuing impact, developing leaders, teams and conducting the research.