Secure Communications One Time Pad Cipher
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A Secure Authentication System- Using Enhanced One Time Pad Technique
IJCSNS International Journal of Computer Science and Network Security, VOL.11 No.2, February 2011 11 A Secure Authentication System- Using Enhanced One Time Pad Technique Raman Kumar1, Roma Jindal 2, Abhinav Gupta3, Sagar Bhalla4 and Harshit Arora 5 1,2,3,4,5 Department of Computer Science and Engineering, 1,2,3,4,5 D A V Institute of Engineering and Technology, Jalandhar, Punjab, India. Summary the various weaknesses associated with a password have With the upcoming technologies available for hacking, there is a come to surface. It is always possible for people other than need to provide users with a secure environment that protect their the authenticated user to posses its knowledge at the same resources against unauthorized access by enforcing control time. Password thefts can and do happen on a regular basis, mechanisms. To counteract the increasing threat, enhanced one so there is a need to protect them. Rather than using some time pad technique has been introduced. It generally random set of alphabets and special characters as the encapsulates the enhanced one time pad based protocol and provides client a completely unique and secured authentication passwords we need something new and something tool to work on. This paper however proposes a hypothesis unconventional to ensure safety. At the same time we need regarding the use of enhanced one time pad based protocol and is to make sure that it is easy to be remembered by you as a comprehensive study on the subject of using enhanced one time well as difficult enough to be hacked by someone else. -
Cryptography in Modern World
Cryptography in Modern World Julius O. Olwenyi, Aby Tino Thomas, Ayad Barsoum* St. Mary’s University, San Antonio, TX (USA) Emails: [email protected], [email protected], [email protected] Abstract — Cryptography and Encryption have been where a letter in plaintext is simply shifted 3 places down used for secure communication. In the modern world, the alphabet [4,5]. cryptography is a very important tool for protecting information in computer systems. With the invention ABCDEFGHIJKLMNOPQRSTUVWXYZ of the World Wide Web or Internet, computer systems are highly interconnected and accessible from DEFGHIJKLMNOPQRSTUVWXYZABC any part of the world. As more systems get interconnected, more threat actors try to gain access The ciphertext of the plaintext “CRYPTOGRAPHY” will to critical information stored on the network. It is the be “FUBSWRJUASLB” in a Caesar cipher. responsibility of data owners or organizations to keep More recent derivative of Caesar cipher is Rot13 this data securely and encryption is the main tool used which shifts 13 places down the alphabet instead of 3. to secure information. In this paper, we will focus on Rot13 was not all about data protection but it was used on different techniques and its modern application of online forums where members could share inappropriate cryptography. language or nasty jokes without necessarily being Keywords: Cryptography, Encryption, Decryption, Data offensive as it will take those interested in those “jokes’ security, Hybrid Encryption to shift characters 13 spaces to read the message and if not interested you do not need to go through the hassle of converting the cipher. I. INTRODUCTION In the 16th century, the French cryptographer Back in the days, cryptography was not all about Blaise de Vigenere [4,5], developed the first hiding messages or secret communication, but in ancient polyalphabetic substitution basically based on Caesar Egypt, where it began; it was carved into the walls of cipher, but more difficult to crack the cipher text. -
A Practical Implementation of a One-Time Pad Cryptosystem
Jeff Connelly CPE 456 June 11, 2008 A Practical Implementation of a One-time Pad Cryptosystem 0.1 Abstract How to securely transmit messages between two people has been a problem for centuries. The first ciphers of antiquity used laughably short keys and insecure algorithms easily broken with today’s computational power. This pattern has repeated throughout history, until the invention of the one-time pad in 1917, the world’s first provably unbreakable cryptosystem. However, the public generally does not use the one-time pad for encrypting their communication, despite the assurance of confidentiality, because of practical reasons. This paper presents an implementation of a practical one-time pad cryptosystem for use between two trusted individuals, that have met previously but wish to securely communicate over email after their departure. The system includes the generation of a one-time pad using a custom-built hardware TRNG as well as software to easily send and receive encrypted messages over email. This implementation combines guaranteed confidentiality with practicality. All of the work discussed here is available at http://imotp.sourceforge.net/. 1 Contents 0.1 Abstract.......................................... 1 1 Introduction 3 2 Implementation 3 2.1 RelatedWork....................................... 3 2.2 Description ........................................ 3 3 Generating Randomness 4 3.1 Inadequacy of Pseudo-random Number Generation . 4 3.2 TrulyRandomData .................................... 5 4 Software 6 4.1 Acquiring Audio . 6 4.1.1 Interference..................................... 6 4.2 MeasuringEntropy................................... 6 4.3 EntropyExtraction................................ ..... 7 4.3.1 De-skewing ..................................... 7 4.3.2 Mixing........................................ 7 5 Exchanging Pads 8 5.1 Merkle Channels . 8 5.2 Local Pad Security . -
Lancaster County, PA Archives
Fictitious Names in Business Index 1917-1983 Derived from original indexes within the Lancaster County Archives collection 1001 Hobbies & Crafts, Inc. Corp 1 656 1059 Columbia Avenue Associates 15 420 120 Antiquities 8 47 121 Studio Gallery 16 261 1226 Gallery Gifts 16 278 1722 Motor Lodge Corp 1 648 1810 Associates 15 444 20th Century Card Co 4 138 20thLancaster Century Housing County,6 PA332 Archives 20th Century Television Service 9 180 222 Service Center 14 130 25th Hour 14 43 28th Division Highway Motor Court 9 225 3rd Regular Infantry Corp 1 568 4 R's Associates 16 227 4 Star Linen Supply 12 321 501 Diner 11 611 57 South George Street Associates 16 302 611 Shop & Gallery 16 192 7 Cousins Park City Corp 1 335 78-80 West Main, Inc. Corp 1 605 840 Realty 16 414 A & A Aluminum 15 211 A & A Credit Exchange 4 449 A & B Associates 13 342 A & B Automotive Warehouse Company Corp 1 486 A & B Electronic Products Leasing 15 169 A & B Manufacturing Company 12 162 A & E Advertising 15 54 A & H Collectors Center 12 557 A & H Disposal 15 56 A & H Drywall Finishers 12 588 A & L Marketing 15 426 A & L Trucking 16 358 A & M Enterprises 15 148 A & M New Car Brokers 15 128 A & M Rentals 12 104 A & P Roofing Company 14 211 A & R Flooring Service 15 216 A & R Nissley, Inc. Corp 1 512 A & R Nissley, Inc. Corp 1 720 A & R Nissley, Inc. Corp 2 95 A & R Tour Services Co. -
Polska Myśl Techniczna W Ii Wojnie Światowej
CENTRALNA BIBLIOTEKA WOJSKOWA IM. MARSZAŁKA JÓZEFA PIŁSUDSKIEGO POLSKA MYŚL TECHNICZNA W II WOJNIE ŚWIATOWEJ W 70. ROCZNICĘ ZAKOŃCZENIA DZIAŁAŃ WOJENNYCH W EUROPIE MATERIAŁY POKONFERENCYJNE poD REDAkcJą NAUkoWą DR. JANA TARCZYńSkiEGO WARSZAWA 2015 Konferencja naukowa Polska myśl techniczna w II wojnie światowej. W 70. rocznicę zakończenia działań wojennych w Europie Komitet naukowy: inż. Krzysztof Barbarski – Prezes Instytutu Polskiego i Muzeum im. gen. Sikorskiego w Londynie dr inż. Leszek Bogdan – Dyrektor Wojskowego Instytutu Techniki Inżynieryjnej im. profesora Józefa Kosackiego mgr inż. Piotr Dudek – Prezes Stowarzyszenia Techników Polskich w Wielkiej Brytanii gen. dyw. prof. dr hab. inż. Zygmunt Mierczyk – Rektor-Komendant Wojskowej Akademii Technicznej im. Jarosława Dąbrowskiego płk mgr inż. Marek Malawski – Szef Inspektoratu Implementacji Innowacyjnych Technologii Obronnych Ministerstwa Obrony Narodowej mgr inż. Ewa Mańkiewicz-Cudny – Prezes Federacji Stowarzyszeń Naukowo-Technicznych – Naczelnej Organizacji Technicznej prof. dr hab. Bolesław Orłowski – Honorowy Członek – założyciel Polskiego Towarzystwa Historii Techniki – Instytut Historii Nauki Polskiej Akademii Nauk kmdr prof. dr hab. Tomasz Szubrycht – Rektor-Komendant Akademii Marynarki Wojennej im. Bohaterów Westerplatte dr Jan Tarczyński – Dyrektor Centralnej Biblioteki Wojskowej im. Marszałka Józefa Piłsudskiego prof. dr hab. Leszek Zasztowt – Dyrektor Instytutu Historii Nauki Polskiej Akademii Nauk dr Czesław Andrzej Żak – Dyrektor Centralnego Archiwum Wojskowego im. -
Historical Ciphers • A
ECE 646 - Lecture 6 Required Reading • W. Stallings, Cryptography and Network Security, Chapter 2, Classical Encryption Techniques Historical Ciphers • A. Menezes et al., Handbook of Applied Cryptography, Chapter 7.3 Classical ciphers and historical development Why (not) to study historical ciphers? Secret Writing AGAINST FOR Steganography Cryptography (hidden messages) (encrypted messages) Not similar to Basic components became modern ciphers a part of modern ciphers Under special circumstances modern ciphers can be Substitution Transposition Long abandoned Ciphers reduced to historical ciphers Transformations (change the order Influence on world events of letters) Codes Substitution The only ciphers you Ciphers can break! (replace words) (replace letters) Selected world events affected by cryptology Mary, Queen of Scots 1586 - trial of Mary Queen of Scots - substitution cipher • Scottish Queen, a cousin of Elisabeth I of England • Forced to flee Scotland by uprising against 1917 - Zimmermann telegram, America enters World War I her and her husband • Treated as a candidate to the throne of England by many British Catholics unhappy about 1939-1945 Battle of England, Battle of Atlantic, D-day - a reign of Elisabeth I, a Protestant ENIGMA machine cipher • Imprisoned by Elisabeth for 19 years • Involved in several plots to assassinate Elisabeth 1944 – world’s first computer, Colossus - • Put on trial for treason by a court of about German Lorenz machine cipher 40 noblemen, including Catholics, after being implicated in the Babington Plot by her own 1950s – operation Venona – breaking ciphers of soviet spies letters sent from prison to her co-conspirators stealing secrets of the U.S. atomic bomb in the encrypted form – one-time pad 1 Mary, Queen of Scots – cont. -
Partial Differential Equations
CALENDAR OF AMS MEETINGS THIS CALENDAR lists all meetings which have been approved by the Council pnor to the date this issue of the Nouces was sent to press. The summer and annual meetings are joint meetings of the Mathematical Association of America and the Ameri· can Mathematical Society. The meeting dates which fall rather far in the future are subject to change; this is particularly true of meetings to which no numbers have yet been assigned. Programs of the meetings will appear in the issues indicated below. First and second announcements of the meetings will have appeared in earlier issues. ABSTRACTS OF PAPERS presented at a meeting of the Society are published in the journal Abstracts of papers presented to the American Mathematical Society in the issue corresponding to that of the Notices which contains the program of the meet ing. Abstracts should be submitted on special forms which are available in many departments of mathematics and from the office of the Society in Providence. Abstracts of papers to be presented at the meeting must be received at the headquarters of the Society in Providence, Rhode Island, on or before the deadline given below for the meeting. Note that the deadline for ab stracts submitted for consideration for presentation at special sessions is usually three weeks earlier than that specified below. For additional information consult the meeting announcement and the list of organizers of special sessions. MEETING ABSTRACT NUMBER DATE PLACE DEADLINE ISSUE 778 June 20-21, 1980 Ellensburg, Washington APRIL 21 June 1980 779 August 18-22, 1980 Ann Arbor, Michigan JUNE 3 August 1980 (84th Summer Meeting) October 17-18, 1980 Storrs, Connecticut October 31-November 1, 1980 Kenosha, Wisconsin January 7-11, 1981 San Francisco, California (87th Annual Meeting) January 13-17, 1982 Cincinnati, Ohio (88th Annual Meeting) Notices DEADLINES ISSUE NEWS ADVERTISING June 1980 April 18 April 29 August 1980 June 3 June 18 Deadlines for announcements intended for the Special Meetings section are the same as for News. -
Trusted Internet Connections (TIC) Reference Architecture Document Version 2.2
Trusted Internet Connections (TIC) Reference Architecture Document Version 2.2 Federal Interagency Technical Reference Architectures June 19, 2017 Federal Network Resilience Revision History Date Version Description Approved By 4/20/09 1.0 Agency feedback M.A. Brown, RADM, USN incorporated and released DAS Cybersecurity & Communications, DHS 3/24/2011 2.0 Capabilities and M. Coose architecture updated by the Director, Federal Network TIC 2.0 Working Group. Security, DHS Final version prepared by DHS. 9/1/2011 2.0 Final approval by OMB M. Coose and reference to M-11-11. Director, Federal Network Security, DHS 9/16/2013 2.0 Added Appendix H – John Streufert Cloud Considerations. Director, Federal Network Resilience, DHS 6/9/2017 2.2 Modified Secure Mark Kneidinger communications from Director, Federal Network Critical to Recommended Resilience, DHS TIC Reference Architecture V2.2 i Table of Contents ACKNOWLEDGEMENTS ........................................................................................................................................ 1 ORIGINAL TIC TECHNICAL ARCHITECTURE STRATEGY TEAM MEMBERS ................................................................. 1 KEY STAKEHOLDERS ................................................................................................................................................. 1 ADVISORS .................................................................................................................................................................. 2 TIC 2.0 UPDATE PARTICIPANTS................................................................................................................................ -
Original Paper Written & Signed by William F
/ I / I p. I I _., • CRYPTOGRAPHIC EQUIP~lliNT FOR EITHER -SINGLE-ORIGINATOR OR MULTI-ORIGINATOR COMMUNICATION 1. a. Progress in the cryptologic field-during the.past fevT yea.,:s has .led to a basic change in cryptologic philosophy, a change Which has already oeen recognized by and is of im., portant interest to the ASA. b. The t1~ust vrhich 'has heretofore been placed in the ordinary types of crypto-systems, the solution of which depends upon, or is directly or indirectly correlated with, the number of tests that have to be made to exhaust a multiplicity of , / hypotheses based upon keying possibilities, is daily decreasing. The beginning of this decreasing confidence i~ the degree of cryptographic security potentially offered by a vast number of permutations and combinations available of keying possibilities can be traced back to the advent of the application of ~abu~ lating machinery to the solution of cryptanalytic problems. _ Later, when specially designed cryptanalytic machines employ- ing electrical relays came to be constructed and applied, success fully to these problems, a real blow was struck at our former concepts of cryptographi·c security. And, now, the assurance that electronic cryptanalytic machinery can be a·pplied to ~?Peed up the solution 9f complex cryptographic systems is tend ing· slm1ly to undermine what faith was left in the systems or crypto-mechanisms currently considered as being the best there are, those using rotors with complicated stepping controls .. , ·· . c.- To sum this up, it can be said that, save for orie exception, cryptologic theory and practice during the past 'quar,ter of a c~ntury serves only to corroborat.E? the theoretical validity of·the century-old dictum first enunciated by Edgar Allan Poe: "Yet it may be r·oundly asserted that ht1.man ingenuity cannot concoct a cipher which human ingenuity cannot solve.11 2. -
(U) a History of Secure Voice Codin~: Insights Drawn from the Career of One of Tile Earliest Practitioners of the Art of Speech Coding JOSEPH P
DOCID: 3860926 UNCLASSIFIED Cryptologic Quarter1y (U) A History of Secure Voice Codin~: Insights Drawn from the Career of One of tile Earliest Practitioners of the Art of Speech Coding JOSEPH P. CAMPBELL, JR., and RICHARD A. DEAN Editor's Note: This artrde Is basecl on one publlshecl In Dlgittl Signal Processing, July 1993, wfth permission ofthe authors. The history of speech coding is closely tied to tion of PCM. A "Buzz" /"Hiss" generator was used the career of Tom Tremain. He joined the as an exciter for the vocoder corresponding to the National Security Agency i~ 1959 as an Air Force voiced/unvoiced attribute of each 20-ms speech lieutenant assigned to duty at the Agency. Llttle segment. Balance of the "Buzz" /"Hiss" generator, did he know then that this assignment would or voicing, represented a major factor in the qual shape his career as well as' the future of speech ity of the speech. Early practitioners of speech coding. 1 coders, like Tom, can still be found today speak I . ing"Aaahhh" /"Sshhhhh" into voice coders to test Thomas E. Tremain was the U.S. govern- this balance. ment's senior speech scientist. He was a recog nized leader and an expert in speech science. From the time of SIGSALY until Tom arrived 1 Tom's work spanned five dife3des of state-of-the- at NSA, several generations of voice coders had art modem and speech co<;Iing innovations that been developed in conjunction with Bell Labs. are the basis of virtually e~ery U.S. and NATO The K0-6 voice coder, developed in 1949 and modem and speech coding standard. -
A STUDY of WRITING Oi.Uchicago.Edu Oi.Uchicago.Edu /MAAM^MA
oi.uchicago.edu A STUDY OF WRITING oi.uchicago.edu oi.uchicago.edu /MAAM^MA. A STUDY OF "*?• ,fii WRITING REVISED EDITION I. J. GELB Phoenix Books THE UNIVERSITY OF CHICAGO PRESS oi.uchicago.edu This book is also available in a clothbound edition from THE UNIVERSITY OF CHICAGO PRESS TO THE MOKSTADS THE UNIVERSITY OF CHICAGO PRESS, CHICAGO & LONDON The University of Toronto Press, Toronto 5, Canada Copyright 1952 in the International Copyright Union. All rights reserved. Published 1952. Second Edition 1963. First Phoenix Impression 1963. Printed in the United States of America oi.uchicago.edu PREFACE HE book contains twelve chapters, but it can be broken up structurally into five parts. First, the place of writing among the various systems of human inter communication is discussed. This is followed by four Tchapters devoted to the descriptive and comparative treatment of the various types of writing in the world. The sixth chapter deals with the evolution of writing from the earliest stages of picture writing to a full alphabet. The next four chapters deal with general problems, such as the future of writing and the relationship of writing to speech, art, and religion. Of the two final chapters, one contains the first attempt to establish a full terminology of writing, the other an extensive bibliography. The aim of this study is to lay a foundation for a new science of writing which might be called grammatology. While the general histories of writing treat individual writings mainly from a descriptive-historical point of view, the new science attempts to establish general principles governing the use and evolution of writing on a comparative-typological basis. -
Design of Discrete-Time Chaos-Based Systems for Hardware Security Applications
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 8-2020 Design of Discrete-time Chaos-Based Systems for Hardware Security Applications Aysha Shanta University of Tennessee, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Recommended Citation Shanta, Aysha, "Design of Discrete-time Chaos-Based Systems for Hardware Security Applications. " PhD diss., University of Tennessee, 2020. https://trace.tennessee.edu/utk_graddiss/6823 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Aysha Shanta entitled "Design of Discrete- time Chaos-Based Systems for Hardware Security Applications." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Electrical Engineering. Garrett Rose, Major Professor We have read this dissertation and recommend its acceptance: Jayne Wu, Hoon Hwangbo, Jinyuan Stella Sun Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Design and Implementation of Discrete-Time Chaos-Based Systems for Hardware Security Applications A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Aysha Siddique Shanta August 2020 © by Aysha Siddique Shanta, 2020 All Rights Reserved.