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Crypto Review
Crypto Review Track 3: Security Workshop Overview • What is Cryptography? • Symmetric Key Cryptography • Asymmetric Key Cryptography • Block and Stream Cipher • Digital Signature and Message Digest Cryptography • Cryptography is everywhere German Lorenz cipher machine Cryptography • Cryptography deals with creang documents that can be shared secretly over public communicaon channels • Other terms closely associated – Cryptanalysis = code breaking – Cryptology • Kryptos (hidden or secret) and Logos (descripGon) = secret speech / communicaon • combinaon of cryptography and cryptanalysis • Cryptography is a funcGon of plaintext and a Notaon: Plaintext (P) cryptographic key Ciphertext (C) C = F(P, k) Cryptographic Key (k) Typical Scenario • Alice wants to send a “secret” message to Bob • What are the possible problems? – Data can be intercepted • What are the ways to intercept this message? • How to conceal the message? – Encrypon Crypto Core • Secure key establishment Alice has key (k) Bob has key (k) • Secure communicaon m Confidenality and integrity m m Alice has key (k) Bob has key (k) Source: Dan Boneh, Stanford It can do much more • Digital Signatures • Anonymous communicaon • Anonymous digital cash – Spending a digital coin without anyone knowing my idenGty – Buy online anonymously? • ElecGons and private aucGons – Finding the winner without actually knowing individual votes (privacy) Source: Dan Boneh, Stanford Other uses are also theoreGcally possible (Crypto magic) What did she • Privately outsourcing computaon search for? E(query) -
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. -
Historical Cryptography 2
Historical cryptography 2 CSCI 470: Web Science • Keith Vertanen Overview • Historical cryptography – WWI • Zimmerman telegram – WWII • Rise of the cipher machines • Engima • Allied encryption 2 WWI: Zimmermann Telegram • 1915, U-boat sinks Lusitania – 1,198 drown including 128 US – Germany agrees to surface 1st • 1916, new Foreign Minister – Arthur Zimmermann • 1917, unrestricted submarine warfare – Zimmermann hatches plan • Keep American busy at home • Persuade Mexico to: invade US and invite Japan to attack US as well Arthur Zimmermann 3 4 Mechanization of secret writing • Pencil and paper – Security limited by what humans can do quickly and accurately in the heat of battle • Enter the machine Thomas Jefferson's wheel cipher Captain Midnight's Code-o-Graph 5 Enigma machine • Enigma cipher machine – 1918, patented by German engineer Arthur Scherbius Arthur Scherbius – A electrical/mechanical implementation of a polyalphabetic substitution cipher 6 7 Enigma rotors • Rotor (wheel, drum) – Monoalphabetic substitution cipher implemented via complex wiring pattern – One of 26 initial positions – Geared: rotates after each letter • Rotor set – 3 rotors in 3!=6 possible orders • Eventually increased to 3 out of 5 • Navy used even more – Possible keys: • 3! * 263 = 6 * 17,576 = 105,456 8 Enigma plugboard • Plugboard – Operator inserts cables to swap letters – Initially 6 cables • Swaps 6 pairs of letters • Leaves 14 letters unswapped – Possible configurations: • 100,391,791,500 • Total keys: – 17,576 * 6 * 100,391,791,500 ≈ 10,000,000,000,000,000 -
CHAPTER 8 a History of Communications Security in New Zealand
CHAPTER 8 A History of Communications Security in New Zealand By Eric Morgon Early Days “Admiralty to Britannia Wellington. Comence hostilities at once with Germany in accordance with War Standing Orders.” This is an entry in the cipher log of HMS Philomel dated 5 August, 1914. HMS Philomel was a cruiser of the Royal Navy and took part in the naval operations in the Dardanelles during the ill-fated Gallipoli campaign. Philomel’s cipher logs covering the period 1914 to 1918 make interesting reading and show how codes and ciphers were used extensively by the Royal Navy during World War 1. New Zealand officers and ratings served on board Philomel and thus it can be claimed that the use of codes and ciphers by Philomel are part of the early history of communications security in New Zealand. Immediately following the codes to Navy Office, the Senior Naval Officer New Zealand was advised that Cypher G and Cypher M had been compromised and that telegrams received by landline in these ciphers were to be recoded in Code C before transmission by Wireless Telegraphy (W/T) Apparently Cypher G was also used for cables between the Commonwealth Navy Board in Melbourne and he British Consul in Noumea. The Rear Admiral Commanding Her Majesty’s Australian Fleet instructed that when signalling by WT every odd numbered code group was to be a dummy. It is interesting to note that up until the outbreak of hostilities no provision had been made for the storage of code books or for precautions to prevent them from falling into enemy hands. -
History and Modern Cryptanalysis of Enigma's Pluggable Reflector
History and Modern Cryptanalysis of Enigma’s Pluggable Reflector Olaf Ostwald and Frode Weierud ABSTRACT: The development history of Umkehrwalze Dora (UKWD), Enigma's pluggable reflector, is presented from the first ideas in the mid-1920s to the last development plans and its actual usage in 1945. An Enigma message in three parts, enciphered with UKWD and intercepted by the British on 11 March 1945, is shown. The successful recovery of the key of this message is described. Modern computer-based cryptanalysis is used to recover the wiring of the unknown “Uncle Dick,” which the British called this field-rewirable reflector. The attack is based on the known ciphertext and plaintext pair from the first part of the intercept. After recovery of the unknown reflector wiring and the daily key the plaintext of the second part of the message is revealed. KEYWORDS: Enigma, cryptanalysis, Uncle Dick, Umkehrwalze Dora, UKWD, unsolved ciphers Address correspondence to Frode Weierud, Bjerkealleen 17, 1385 Asker, Norway. Email: [email protected] 1. Introduction Uncle Dick,1 as it was called by the codebreakers of Bletchley Park (BP), or Umkehrwalze Dora (UKWD), as designated by the Germans, was the nickname of a special pluggable reflector,2 used as the leftmost wheel within the scrambler 3 of the Enigma. The electro-mechanical cipher machine Enigma (from Greek αίνιγµα for “riddle”) was the backbone of the German Wehrmacht during World War II. Arthur Scherbius, a German promoted electrical engineer and inventor of considerable standing, invented Enigma in 1918 [14]. Subsequently it was improved and then used by all three parts of the German armed forces, namely army (Heer), air force (Luftwaffe), and military navy (Kriegsmarine), for enciphering and deciphering of their secret messages. -
Simply Turing
Simply Turing Simply Turing MICHAEL OLINICK SIMPLY CHARLY NEW YORK Copyright © 2020 by Michael Olinick Cover Illustration by José Ramos Cover Design by Scarlett Rugers All rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law. For permission requests, write to the publisher at the address below. [email protected] ISBN: 978-1-943657-37-7 Brought to you by http://simplycharly.com Contents Praise for Simply Turing vii Other Great Lives x Series Editor's Foreword xi Preface xii Acknowledgements xv 1. Roots and Childhood 1 2. Sherborne and Christopher Morcom 7 3. Cambridge Days 15 4. Birth of the Computer 25 5. Princeton 38 6. Cryptology From Caesar to Turing 44 7. The Enigma Machine 68 8. War Years 85 9. London and the ACE 104 10. Manchester 119 11. Artificial Intelligence 123 12. Mathematical Biology 136 13. Regina vs Turing 146 14. Breaking The Enigma of Death 162 15. Turing’s Legacy 174 Sources 181 Suggested Reading 182 About the Author 185 A Word from the Publisher 186 Praise for Simply Turing “Simply Turing explores the nooks and crannies of Alan Turing’s multifarious life and interests, illuminating with skill and grace the complexities of Turing’s personality and the long-reaching implications of his work.” —Charles Petzold, author of The Annotated Turing: A Guided Tour through Alan Turing’s Historic Paper on Computability and the Turing Machine “Michael Olinick has written a remarkably fresh, detailed study of Turing’s achievements and personal issues. -
National Security Agency (NSA) Document: a History of U.S
Description of document: National Security Agency (NSA) document: A History of U.S. Communications Security Post World-War II – released under Mandatory Declassification Review (MDR) Released date: February 2011 Posted date: 07-November-2011 Source of document: National Security Agency Declassification Services (DJ5) Suite 6884, Bldg. SAB2 9800 Savage Road Ft. George G. Meade, MD, 20755-6884 Note: Although the titles are similar, this document should not be confused with the David G. Boak Lectures available: http://www.governmentattic.org/2docs/Hist_US_COMSEC_Boak_NSA_1973.pdf The governmentattic.org web site (“the site”) is noncommercial and free to the public. The site and materials made available on the site, such as this file, are for reference only. The governmentattic.org web site and its principals have made every effort to make this information as complete and as accurate as possible, however, there may be mistakes and omissions, both typographical and in content. The governmentattic.org web site and its principals shall have neither liability nor responsibility to any person or entity with respect to any loss or damage caused, or alleged to have been caused, directly or indirectly, by the information provided on the governmentattic.org web site or in this file. The public records published on the site were obtained from government agencies using proper legal channels. Each document is identified as to the source. Any concerns about the contents of the site should be directed to the agency originating the document in question. GovernmentAttic.org is not responsible for the contents of documents published on the website. -----------------------------------------------------------------------~~) '; I .:· ! _k:::._,.l COMitfll A HISTORY OF U.S. -
A Review Analysis of Two Fish Algorithm Cryptography Quantum Computing
IJCSN International Journal of Computer Science and Network, Volume 6, Issue 1, February 2017 ISSN (Online) : 2277-5420 www.IJCSN.org Impact Factor: 1.5 A Review Analysis of Two Fish Algorithm Cryptography Quantum Computing 1 Sukhvandna Abhi, 2 Umesh Sehgal 1, 2 GNA University Phagwara Abstract - In this analysis paper we tend to describe the evolution of cryptography ranging from the start of the twentieth century and continued into this day. Last 10 years quantum computing can begin to trounce everyday computers, resulting in breakthroughs in computer science. Specifically within the cryptography used from 1900 till the tip of war II.Quantum technologies supply immoderate secure communication sensors of unprecedented exactness and computers that square measure exponentially a lot of powerful than any mainframe for a given task. We compare the performance of the 5 AES finalists one kind of common software package platforms current 32-bit CPUs and high finish sixty four bit CPUs. Our intent is to indicate roughly however the algorithm’s speeds compare across a range of CPUs.The future of cryptography primarily based within the field of natural philosophy and by analyzing the hope to supply a allot of complete image of headed the 2 mail algorithms utilized in cryptography world. Keywords - Cryptography ancient secret writing system 1. Introduction regulated wherever the primary letter is substituted by the last letter, the second letter by the second to last letter then ryptography may be a subject that has been studied on. as a result of it's a monoalphabetic cipher and may and applied since ancient Roman times, and have only 1 doable key, this cipher is comparatively weak; Canalysis into higher coding ways continues to the but this wasn't a viable concern throughout its time as current day. -
TICOM: the Last Great Secret of World War II Randy Rezabek Version of Record First Published: 27 Jul 2012
This article was downloaded by: [Randy Rezabek] On: 28 July 2012, At: 18:04 Publisher: Routledge Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Intelligence and National Security Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/fint20 TICOM: The Last Great Secret of World War II Randy Rezabek Version of record first published: 27 Jul 2012 To cite this article: Randy Rezabek (2012): TICOM: The Last Great Secret of World War II, Intelligence and National Security, 27:4, 513-530 To link to this article: http://dx.doi.org/10.1080/02684527.2012.688305 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.tandfonline.com/page/terms-and- conditions This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. Intelligence and National Security Vol. 27, No. 4, 513–530, August 2012 TICOM: The Last Great Secret of World War II RANDY REZABEK* ABSTRACT Recent releases from the National Security Agency reveal details of TICOM, the mysterious 1945 operation targeting Germany’s cryptologic secrets. -
A Complete Bibliography of Publications in Cryptologia
A Complete Bibliography of Publications in Cryptologia Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 04 September 2021 Version 3.64 Title word cross-reference 10016-8810 [?, ?]. 1221 [?]. 125 [?]. 15.00/$23.60.0 [?]. 15th [?, ?]. 16th [?]. 17-18 [?]. 18 [?]. 180-4 [?]. 1812 [?]. 18th (t; m)[?]. (t; n)[?, ?]. $10.00 [?]. $12.00 [?, ?, ?, ?, ?]. 18th-Century [?]. 1930s [?]. [?]. 128 [?]. $139.99 [?]. $15.00 [?]. $16.95 1939 [?]. 1940 [?, ?]. 1940s [?]. 1941 [?]. [?]. $16.96 [?]. $18.95 [?]. $24.00 [?]. 1942 [?]. 1943 [?]. 1945 [?, ?, ?, ?, ?]. $24.00/$34 [?]. $24.95 [?, ?]. $26.95 [?]. 1946 [?, ?]. 1950s [?]. 1970s [?]. 1980s [?]. $29.95 [?]. $30.95 [?]. $39 [?]. $43.39 [?]. 1989 [?]. 19th [?, ?]. $45.00 [?]. $5.95 [?]. $54.00 [?]. $54.95 [?]. $54.99 [?]. $6.50 [?]. $6.95 [?]. $69.00 2 [?, ?]. 200/220 [?]. 2000 [?]. 2004 [?, ?]. [?]. $69.95 [?]. $75.00 [?]. $89.95 [?]. th 2008 [?]. 2009 [?]. 2011 [?]. 2013 [?, ?]. [?]. A [?]. A3 [?, ?]. χ [?]. H [?]. k [?, ?]. M 2014 [?]. 2017 [?]. 2019 [?]. 20755-6886 [?, ?]. M 3 [?]. n [?, ?, ?]. [?]. 209 [?, ?, ?, ?, ?, ?]. 20th [?]. 21 [?]. 22 [?]. 220 [?]. 24-Hour [?, ?, ?]. 25 [?, ?]. -Bit [?]. -out-of- [?, ?]. -tests [?]. 25.00/$39.30 [?]. 25.00/839.30 [?]. 25A1 [?]. 25B [?]. 26 [?, ?]. 28147 [?]. 28147-89 000 [?]. 01Q [?, ?]. [?]. 285 [?]. 294 [?]. 2in [?, ?]. 2nd [?, ?, ?, ?]. 1 [?, ?, ?, ?]. 1-4398-1763-4 [?]. 1/2in [?, ?]. 10 [?]. 100 [?]. 10011-4211 [?]. 3 [?, ?, ?, ?]. 3/4in [?, ?]. 30 [?]. 310 1 2 [?, ?, ?, ?, ?, ?, ?]. 312 [?]. 325 [?]. 3336 [?, ?, ?, ?, ?, ?]. affine [?]. [?]. 35 [?]. 36 [?]. 3rd [?]. Afluisterstation [?, ?]. After [?]. Aftermath [?]. Again [?, ?]. Against 4 [?]. 40 [?]. 44 [?]. 45 [?]. 45th [?]. 47 [?]. [?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?]. Age 4in [?, ?]. [?, ?]. Agencies [?]. Agency [?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?]. -
Docid: 383869,.9
.. DOCID: 383869,.9 / ,1/111 [ Der Fall WICHER:GermanKnowledge of i Polish Success on ENIGMA BY JOSEPH A. MEYER T'op Bed pi blat'" a In 19.39 the Germans found evidf'nce. including decrypts, that a Polish cryptanalytic organization, WICHER: had been readin!! the ENIGMA. Documents and interrogations did not reveal how the ma chine could have been read, and after some changes in the indicator system and plug/fings, the matter was dropped. In 1943, further evidence of prewar Polish success, and the Mrong appearance that Navy ENIGMA was being read by the British and US., caused a crypto security crisis. A spy in the U.S. NavyDepartment reported the reading of V-boat keys. ENIGMA security was studied. and many changes in the machine and its uWf.:e were undertaken. By 1944 the Germans acted and spoke as if they knew ENIGMA traffic was being read by the Allies, but they suspected betrayal or compromise of keys. Medium grade ciphers were also improved, and radiQ security was much im proVf'd. Users were forbidden to send secret or top .~ecrf!t information or operational orders over ENIGMA. Through all of this. German con /idence in the TUNNY cipher teleprinter (which wa.~ al.~o being read) neller wavered. The key to German suspicions of ENIGMA appears to have been the knowledge of Polish prewar successes; after which the wartime ENIGMA exploitation hunk by a thread for five and one-half ~~. I I. DER FALL WICHER' 1n late 19:39. after their rapid conquest of Poland. the German OKH (Oberkommando des Heeres, Army High Command) and OKW (Oherkommando der Wehrmacht, Armed Forces High Command) cryptanalysts obtained definite proof, incllldin~ decrypts of German messag-cs. -
Alan Turing 1 Alan Turing
Alan Turing 1 Alan Turing Alan Turing Turing at the time of his election to Fellowship of the Royal Society. Born Alan Mathison Turing 23 June 1912 Maida Vale, London, England, United Kingdom Died 7 June 1954 (aged 41) Wilmslow, Cheshire, England, United Kingdom Residence United Kingdom Nationality British Fields Mathematics, Cryptanalysis, Computer science Institutions University of Cambridge Government Code and Cypher School National Physical Laboratory University of Manchester Alma mater King's College, Cambridge Princeton University Doctoral advisor Alonzo Church Doctoral students Robin Gandy Known for Halting problem Turing machine Cryptanalysis of the Enigma Automatic Computing Engine Turing Award Turing test Turing patterns Notable awards Officer of the Order of the British Empire Fellow of the Royal Society Alan Mathison Turing, OBE, FRS ( /ˈtjʊərɪŋ/ TEWR-ing; 23 June 1912 – 7 June 1954), was a British mathematician, logician, cryptanalyst, and computer scientist. He was highly influential in the development of computer science, giving a formalisation of the concepts of "algorithm" and "computation" with the Turing machine, which can be considered a model of a general purpose computer.[1][2][3] Turing is widely considered to be the father of computer science and artificial intelligence.[4] During World War II, Turing worked for the Government Code and Cypher School (GC&CS) at Bletchley Park, Britain's codebreaking centre. For a time he was head of Hut 8, the section responsible for German naval cryptanalysis. He devised a number of techniques for breaking German ciphers, including the method of the bombe, an electromechanical machine that could find settings for the Enigma machine.