Cryptographic Concepts


 Allison Hines
 6 months ago
 Views:
Transcription
1 Outline Identify the different types of cryptography Learn about current cryptographic methods Chapter #23: Cryptography Understand how cryptography is applied for security Given a scenario, utilize general cryptography concepts Cryptographic Concepts 2 Cryptography Cryptanalysis Cryptography is the science of encrypting information Transposition cipher where the same letters are used but the order is changed Shift cipher where one letter of the alphabet is shifted a set number of places in the alphabet for another letter Cryptanalysis process of analyzing available information to attempt to return the encrypted message to its original form Differential cryptanalysis comparing the input plaintext to the output ciphertext to try and determine the key Linear cryptanalysis uses both plaintext and ciphertext, but it puts the plaintext through a simplified cipher to try and deduce what the key is likely to be in the full version of the cipher 3 4 1
2 Algorithms Symmetric Encryption Encryption schemes are based upon an algorithm stepbystep problemsolving procedure made up of mathematical steps for encrypting and decrypting information They are designed to use a key a special piece of data used in both the encryption and decryption processes The algorithms are the same, but every implementation uses a different key Usually use same key for encryption and decryption Encryption key can be calculated from decryption key and vice versa Require sender and receiver to agree on a key before they communicate securely Security lies with the key Also called secret key algorithms, singlekey algorithms, or onekey algorithms 5 6 Asymmetric Encryption Symmetric vs. Asymmetric Use different keys for encryption and decryption Decryption key cannot be calculated from the encryption key Anyone can use the key to encrypt data and send it to the Type of Algorithm Advantages Disadvantages Symmetric Single key Requires sender and receiver to agree on a key before transmission of data Security lies only with the key High costs host; only the host can decrypt the data Asymmetric Encryption and decryption keys Security of keys can be compromised when Also known as public key algorithms are different malicious users post phony keys Decryption key cannot be calculated from encryption key 7 8 2
3 Key Exchange Algorithms Central foundational element of a secure symmetric encryption system. outofband exchange curriers DiffieHellman key exchange inband exchange Stream algorithms Operate on the plaintext one bit at a time Block algorithms Encrypt and decrypt data in groups of bits, typically 64/128/512 bits in size mod function XOR function (114 XOR 220) XOR = Algorithms ECC (Elliptic Curve Cryptography) ECC works on the basis of elliptic curves y 2 = x 3 + ax 2 + b They have a special property you can add two points on the curve together and get a third point on the curve Users agree on a curve and a fix point With a secret random number calculate a public key That can be used to encrypt messages
4 Hashing Hashing A hash is a special mathematical function that performs oneway encryption Hashing can produce a unique value corresponding to the data entered Message authentication code (MAC) and the computational Can be attacked with what is called a collision attack two different messages that hash to the same value Two of the popular hash algorithms are Secure Hash Algorithm (SHA) and Message Digest of varying versions (MD2, MD4, MD5) number shows that no intermediary has modified the message SHA Message Digest (MD) 2 64 = bits ( chars) Encoding creates 32 bit long words in hexa format 16 of them make up a 512 bit block They will be processed into a 160 bit string Hash output of 128 bits Optimization MD2 > 8 bit, MD4 & MD5 > 32 bit CPU MD2 128 bit blocks; MD4 & MD5 512 bit blocks MD4 is only 2x MD2 collision can harm security MD5 improves MD4 by adding a 64 bit version of the original length. It uses different nonlinear functions applied 16 times on three of the four 32 bit segments
5 Hashing Summary Usage Less data needs to be signed by the more complex asymmetric encryption Maintains assurances about message integrity Security typically defined as a product of five components: confidentiality, integrity, availability, authentication, and nonrepudiation. Encryption can address four of these five components: confidentiality, integrity, authentication, and nonrepudiation Confidentiality Integrity Symmetric encryption is favored both on stored data and on transmitted data For stored items there is typically no need for a public key For transmitted data, the typical case is to use public key cryptography to exchange the secret key, and then to use symmetric cryptography to ensure the confidentiality of the data does protect confidentiality, but its Size and speed make asymmetric cryptography more efficient at protecting small units It is provided with oneway hash functions and digital signatures
6 Authentication Nonrepudiation Proof you are who you say you are Generally used before communication Password, token (digital certification), or biometric Asymmetric encryption is better suited It means that the senders cannot later deny that they sent the message Nonrepudiation is tied to asymmetric cryptography and cannot be implemented with symmetric algorithms Digital Signatures Key Escrow Digital signatures are based upon both hashing functions and asymmetric cryptography User can decrypt the hash with the public key of the Key escrow and key recovery System by which your private key is kept both by you and by a third party originator, that user knows that the hash was encrypted by the corresponding private key nonrepudiation
7 There is no 100 percent secure system, and there is nothing that is foolproof! Stay Alert! 7
Computer Security: Principles and Practice
Computer Security: Principles and Practice Chapter 2 Cryptographic Tools First Edition by William Stallings and Lawrie Brown Lecture slides by Lawrie Brown Cryptographic Tools cryptographic algorithms
More informationGlenda Whitbeck Global Computing Security Architect Spirit AeroSystems
Glenda Whitbeck Global Computing Security Architect Spirit AeroSystems History 2000 B.C. Egyptian Hieroglyphics Atbash  Hebrew Original alphabet mapped to different letter Type of Substitution Cipher
More information(2½ hours) Total Marks: 75
(2½ hours) Total Marks: 75 N. B.: (1) All questions are compulsory. (2) Makesuitable assumptions wherever necessary and state the assumptions made. (3) Answers to the same question must be written together.
More informationPrinciples of Information Security, Fourth Edition. Chapter 8 Cryptography
Principles of Information Security, Fourth Edition Chapter 8 Cryptography Learning Objectives Upon completion of this material, you should be able to: Chronicle the most significant events and discoveries
More information06/02/ Local & Metropolitan Area Networks. 0. Overview. Terminology ACOE322. Lecture 8 Network Security
1 Local & Metropolitan Area Networks ACOE322 Lecture 8 Network Security Dr. L. Christofi 1 0. Overview As the knowledge of computer networking and protocols has become more widespread, so the threat of
More informationCryptography Introduction
Cryptography Introduction Last Updated: Aug 20, 2013 Terminology Access Control o Authentication Assurance that entities are who they claim to be o Authorization Assurance that entities have permission
More informationHistory Of Cryptography
1 Cryptography History Of Cryptography Pen and Paper Cryptography 2000 B.C. 1750 AD Examples: Caesar Vigenère Mechanical cipher machines 17501950 Confederate Army s Cipher Disk Japanese Red and Purple
More informationClassical Cryptography. Thierry Sans
Classical Cryptography Thierry Sans Example and definitions of a cryptosystem Caesar Cipher  the oldest cryptosystem A shift cipher attributed to Julius Caesar (10044 BC) MEET ME AFTER THE TOGA PARTY
More informationThe question paper contains 40 multiple choice questions with four choices and students will have to pick the correct one (each carrying ½ marks.).
Time: 3hrs BCA III Network security and Cryptography Examination2016 Model Paper 2 M.M:50 The question paper contains 40 multiple choice questions with four choices and students will have to pick the
More informationOverview. SSL Cryptography Overview CHAPTER 1
CHAPTER 1 Secure Sockets Layer (SSL) is an applicationlevel protocol that provides encryption technology for the Internet. SSL ensures the secure transmission of data between a client and a server through
More informationSecurity: Cryptography
Security: Cryptography Computer Science and Engineering College of Engineering The Ohio State University Lecture 38 Some HighLevel Goals Confidentiality Nonauthorized users have limited access Integrity
More informationIntroduction Classical Confidentiality Modern Confidentiality Integrity Authentication
Cryptography Introduction Classical Confidentiality Modern Confidentiality Integrity Authentication Introduction Cryptography in the Real World Cryptography is the process of writing or reading secret
More informationLecture III : Communication Security Mechanisms
Lecture III : Communication Security Mechanisms Internet Security: Principles & Practices John K. Zao, PhD (Harvard) SMIEEE Computer Science Department, National Chiao Tung University 2 X.800 : Security
More informationWAP Security. Helsinki University of Technology S Security of Communication Protocols
WAP Security Helsinki University of Technology S38.153 Security of Communication Protocols Mikko.Kerava@iki.fi 15.4.2003 Contents 1. Introduction to WAP 2. Wireless Transport Layer Security 3. Other WAP
More informationSymmetric, Asymmetric, and One Way Technologies
Symmetric, Asymmetric, and One Way Technologies Crypto Basics Ed Crowley Fall 2010 1 Topics: Symmetric & Asymmetric Technologies Kerckhoff s Principle Symmetric Crypto Overview Key management problem Attributes
More informationTechnological foundation
Technological foundation Carte à puce et Java Card 20102011 JeanLouis Lanet Jeanlouis.lanet@unilim.fr Cryptology Authentication Secure upload Agenda Cryptology Cryptography / Cryptanalysis, Smart Cards
More informationAppendix A: Introduction to cryptographic algorithms and protocols
Security and Cooperation in Wireless Networks http://secowinet.epfl.ch/ Appendix A: Introduction to cryptographic algorithms and protocols 2007 Levente Buttyán and JeanPierre Hubaux symmetric and asymmetric
More informationOther Uses of Cryptography. Cryptography Goals. Basic Problem and Terminology. Other Uses of Cryptography. What Can Go Wrong? Why Do We Need a Key?
ryptography Goals Protect private communication in the public world and are shouting messages over a crowded room no one can understand what they are saying 1 Other Uses of ryptography Authentication should
More informationNETWORK SECURITY & CRYPTOGRAPHY
Assignment for IT Applications in Management Project On NETWORK SECURITY & CRYPTOGRAPHY Course Instructor Submitted By: Mr. ANIL KUMAR ROHIT BARVE 2013240 Section E PGDM 201315 Table of Contents Chapter
More informationBCA III Network security and Cryptography Examination2016 Model Paper 1
Time: 3hrs BCA III Network security and Cryptography Examination2016 Model Paper 1 M.M:50 The question paper contains 40 multiple choice questions with four choices and student will have to pick the correct
More informationFIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2
FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. 9 Encryption and Firewalls By Whitman, Mattord & Austin 2008 Course Technology Learning Objectives Describe the role encryption
More information3 Symmetric Key Cryptography 3.1 Block Ciphers Symmetric key strength analysis Electronic Code Book Mode (ECB) Cipher Block Chaining Mode (CBC) Some
3 Symmetric Key Cryptography 3.1 Block Ciphers Symmetric key strength analysis Electronic Code Book Mode (ECB) Cipher Block Chaining Mode (CBC) Some popular block ciphers Triple DES Advanced Encryption
More information1.264 Lecture 28. Cryptography: Asymmetric keys
1.264 Lecture 28 Cryptography: Asymmetric keys Next class: Anderson chapters 20. Exercise due before class (Reading doesn t cover same topics as lecture) 1 Asymmetric or public key encryption Receiver
More informationKey Management. Digital signatures: classical and public key Classic and Public Key exchange. Handwritten Signature
Key Management Digital signatures: classical and public key Classic and Public Key exchange 1 Handwritten Signature Used everyday in a letter, on a check, sign a contract A signature on a signed paper
More informationCS 161 Computer Security
Raluca Popa Spring 2018 CS 161 Computer Security Homework 2 Due: Wednesday, February 14, at 11:59pm Instructions. This homework is due Wednesday, February 14, at 11:59pm. No late homeworks will be accepted.
More informationSSH PK Authentication and Auto login configuration for Chassis Management Controller
SSH PK Authentication and Auto login configuration for Chassis Management Controller Dell technical white paper Dell Engineering May 2016 Author: Elangovan G Revisions Date August 2013 May 2016 Description
More informationChapter 3 Traditional SymmetricKey Ciphers 3.1
Chapter 3 Traditional SymmetricKey Ciphers 3.1 Copyright The McGrawHill Companies, Inc. Permission required for reproduction or display. Chapter 3 Objectives To define the terms and the concepts of symmetric
More informationSlides by Kent Seamons and Tim van der Horst Last Updated: Oct 7, 2013
Digital Signatures Slides by Kent Seamons and Tim van der Horst Last Updated: Oct 7, 2013 Digital Signatures Diagram illustrating how to sign a message Why do we use a oneway hash? How does a collision
More informationIBM i Version 7.2. Security Digital Certificate Manager IBM
IBM i Version 7.2 Security Digital Certificate Manager IBM IBM i Version 7.2 Security Digital Certificate Manager IBM Note Before using this information and the product it supports, read the information
More informationCryptanalysis. Ed Crowley
Cryptanalysis Ed Crowley 1 Topics Cryptanalysis History Modern Cryptanalysis Characterization of Cryptanalysis Attacks Attack Types 2 Cryptanalysis Science of cracking ciphers and codes, decoding secrets,
More informationnbit Output Feedback
nbit Output Feedback Cryptography IV Encrypt Encrypt Encrypt P 1 P 2 P 3 C 1 C 2 C 3 Steven M. Bellovin September 16, 2006 1 Properties of Output Feedback Mode No error propagation Active attacker can
More informationPASSWORDS & ENCRYPTION
PASSWORDS & ENCRYPTION Villanova University Department of Computing Sciences D. Justin Price Fall 2014 CRYPTOGRAPHY Hiding the meaning of a message from unintended recipients. Open source algorithms are
More informationPGP: An Algorithmic Overview
PGP: An Algorithmic Overview David Yaw 11/6/2001 VCSG482 Introduction The purpose of this paper is not to act as a manual for PGP, nor is it an indepth analysis of its cryptographic algorithms. It is
More informationCipher Suite Configuration Mode Commands
The Cipher Suite Configuration Mode is used to configure the building blocks for SSL cipher suites, including the encryption algorithm, hash function, and key exchange. Important The commands or keywords/variables
More informationGrenzen der Kryptographie
Microsoft Research Grenzen der Kryptographie Dieter Gollmann Microsoft Research 1 Summary Crypto does not solve security problems Crypto transforms security problems Typically, the new problems relate
More informationOutline. Public Key Cryptography. Applications of Public Key Crypto. Applications (Cont d)
Outline AIT 682: Network and Systems Security 1. Introduction 2. RSA 3. DiffieHellman Key Exchange 4. Digital Signature Standard Topic 5.2 Public Key Cryptography Instructor: Dr. Kun Sun 2 Public Key
More informationTuesday, January 17, 17. Crypto  mini lecture 1
Crypto  mini lecture 1 Cryptography Symmetric key cryptography (secret key crypto): sender and receiver keys identical Asymmetric key cryptography (public key crypto): encryption key public, decryption
More informationChapter 15: Security. Chapter 15: Security
Chapter 15: Security Chapter 15: Security The Security Problem Program Threats System and Network Threats Cryptography as a Security Tool User Authentication Firewalling to Protect Systems and Networks
More informationContent of this part
UNIVERSITY OF MASSACHUSETTS Dept. of Electrical & Computer Engineering Introduction to Cryptography ECE 597XX/697XX Part 5 More About Block Ciphers Israel Koren ECE597/697 Koren Part.5.1 Content of this
More informationIntroduction to Cryptography.  Foundations of computer security 
Introduction to Cryptography  Foundations of computer security  Related Chapters Cryptography CHAPTER 2, A Cryptography Primer CHAPTER 37, Data Encryption CHAPTER 39, Public Key Infrastructure CHAPTER
More informationDataTraveler 5000 (DT5000) and DataTraveler 6000 (DT6000) Ultimate Security in a USB Flash Drive. Submitted by SPYRUS, Inc.
Submitted by SPYRUS, Inc. Contents DT5000 and DT6000 Technology Overview...2 Why DT5000 and DT6000 Encryption Is Different...3 Why DT5000 and DT6000 Encryption Is Different  Summary...4 XTSAES SectorBased
More informationCompTIA Security+ (Exam SY0401) Course 01 Security Fundamentals
CompTIA Security+ (Exam SY0401) Course 01 Security Fundamentals This course contains copyrighted material used by permission of Logical Operations, Inc. Slide 1 Course 01: Security Fundamentals The Information
More informationMost Common Security Threats (cont.)
Most Common Security Threats (cont.) Denial of service (DoS) attack Distributed denial of service (DDoS) attack Insider attacks. Any examples? Poorly designed software What is a zeroday vulnerability?
More information6 Cryptographic Techniques A Brief Introduction
6 Cryptographic Techniques A Brief Introduction 6.1 Introduction to Cryptography 6.2 Symmetric Encryption 6.3 Asymmetric (PublicKey) Encryption 6.4 Digital Signatures 6.5 Public Key Infrastructures Literature:
More informationIntro to Public Key Cryptography Diffie & Hellman Key Exchange
Intro to Public Key Cryptography Diffie & Hellman Key Exchange Course Summary Introduction Stream & Block Ciphers Block Ciphers Modes (ECB,CBC,OFB) Advanced Encryption Standard (AES) Message Authentication
More informationProf. Shervin Shirmohammadi SITE, University of Ottawa. Security Architecture. Lecture 13: Prof. Shervin Shirmohammadi CEG
Lecture 13: Security Architecture Prof. Shervin Shirmohammadi SITE, University of Ottawa Prof. Shervin Shirmohammadi CEG 4185 131 Network Assets and Security Threats Assets: Hardware (PC, workstation,
More informationDiffieHellman. Part 1 Cryptography 136
DiffieHellman Part 1 Cryptography 136 DiffieHellman Invented by Williamson (GCHQ) and, independently, by D and H (Stanford) A key exchange algorithm o Used to establish a shared symmetric key Not for
More informationAcronyms. International Organization for Standardization International Telecommunication Union ITU Telecommunication Standardization Sector
Acronyms 3DES AES AH ANSI CBC CESG CFB CMAC CRT DoS DEA DES DoS DSA DSS ECB ECC ECDSA ESP FIPS IAB IETF IP IPsec ISO ITU ITUT Triple DES Advanced Encryption Standard Authentication Header American National
More informationSecurity I exercises
Security I exercises Markus Kuhn Lent 2013 Part IB 1 Cryptography 1.1 Some mathematical prerequisites 1.2 Historic ciphers Exercise 1 Decipher the shift cipher text LUXDZNUAMNDODJUDTUZDGYQDLUXDGOJDCKDTKKJDOZ
More informationCryptographic Techniques. Information Technologies for IPR Protections 2003/11/12 R107, CSIE Building
Cryptographic Techniques Information Technologies for IPR Protections 2003/11/12 R107, CSIE Building Outline Data security Cryptography basics Cryptographic systems DES RSA C. H. HUANG IN CML 2 Cryptography
More informationIBM i Version 7.2. Security Cryptography IBM
IBM i Version 7.2 Security ryptography IBM IBM i Version 7.2 Security ryptography IBM Note Before using this information and the product it supports, read the information in Notices on page 275. This
More informationElliptic Curve Public Key Cryptography
Why? Elliptic Curve Public Key Cryptography ECC offers greater security for a given key size. Why? Elliptic Curve Public Key Cryptography ECC offers greater security for a given key size. The smaller key
More informationFoundations of Cryptology
Multimedia Security Mauro Barni University of Siena Cryptography Cryptography is the art or science of keeping messages secret; the word cryptography is derived from Greek and literally means secret (crypto)
More informationCryptography and Network Security 2. Symmetric Ciphers. Lectured by Nguyễn Đức Thái
Cryptography and Network Security 2. Symmetric Ciphers Lectured by Nguyễn Đức Thái Outline Symmetric Encryption Substitution Techniques Transposition Techniques Steganography 2 Symmetric Encryption There
More information18642: Cryptography 11/15/ Philip Koopman
18642: Cryptography 11/15/2017 Cryptography Overview AntiPatterns for Cryptography Using a homemade cryptographic algorithm Using private key when public key is required Not considering key distribution
More informationA Proposed Method for Cryptography using Random Key and Rotation of Text
Volume 6, No.2, March  April 2017 Mousumi Ghanti et al., International Journal of Advanced Trends in Computer Science and Engineering, 6(2), March  April 2017, 1822 Available Online at http://www.warse.org/ijatcse/static/pdf/file/ijatcse03622017.pdf
More informationPublic Key Cryptography
Public Key Cryptography Giuseppe F. Italiano Universita` di Roma Tor Vergata italiano@disp.uniroma2.it Motivation Until early 70s, cryptography was mostly owned by government and military Symmetric cryptography
More informationSession key establishment protocols
our task is to program a computer which gives answers which are subtly and maliciously wrong at the most inconvenient possible moment.  Ross Anderson and Roger Needham, Programming Satan s computer Session
More informationUnderstanding Cryptography A Textbook for Students and Practitioners by Christof Paar and Jan Pelzl. Chapter 6 Introduction to PublicKey Cryptography
Understanding Cryptography A Textbook for Students and Practitioners by Christof Paar and Jan Pelzl www.cryptotextbook.com Chapter 6 Introduction to PublicKey Cryptography ver. November 18, 2010 These
More informationNetwork Security Essentials
Network Security Essentials Applications and Standards Third Edition William Stallings Chapter 2 Symmetric Encryption and Message Confidentiality Dr. BHARGAVI H. GOSWAMI Department of Computer Science
More informationRSA BSAFE CryptoC Micro Edition Security Policy
Security Policy 15.11.12 RSA BSAFE CryptoC Micro Edition 3.0.0.16 Security Policy This document is a nonproprietary security policy for RSA BSAFE CryptoC Micro Edition 3.0.0.16 (CryptoC ME) security
More informationCPSC 467: Cryptography and Computer Security
CPSC 467: Cryptography and Computer Security Michael J. Fischer Lecture 11 October 4, 2017 CPSC 467, Lecture 11 1/39 ElGamal Cryptosystem Message Integrity and Authenticity Message authentication codes
More informationAbhijith Chandrashekar and Dushyant Maheshwary
By Abhijith Chandrashekar and Dushyant Maheshwary Introduction What are Elliptic Curves? Curve with standard form y 2 = x 3 + ax + b a, b ϵ R Characteristics of Elliptic Curve Forms an abelian group Symmetric
More informationSecure Multiparty Computation
CS573 Data Privacy and Security Secure Multiparty Computation Problem and security definitions Li Xiong Outline Cryptographic primitives Symmetric Encryption Public Key Encryption Secure Multiparty Computation
More informationKey Management and Elliptic Curves
Key Management and Elliptic Curves Key Management Distribution of ublic Keys ublickey Distribution of Secret Keys DiffieHellman Key Echange Elliptic Curves Mathematical foundations Elliptic curves over
More informationCryptography and Network Security Block Ciphers + DES. Lectured by Nguyễn Đức Thái
Cryptography and Network Security Block Ciphers + DES Lectured by Nguyễn Đức Thái Outline Block Cipher Principles Feistel Ciphers The Data Encryption Standard (DES) (Contents can be found in Chapter 3,
More informationPublic Key Algorithms
CSE597B: Special Topics in Network and Systems Security Public Key Cryptography Instructor: Sencun Zhu The Pennsylvania State University Public Key Algorithms Public key algorithms RSA: encryption and
More informationSecurity Requirements
Message Authentication and Hash Functions CSCI 454/554 Security Requirements disclosure traffic analysis masquerade content modification sequence modification timing modification source repudiation destination
More informationNumber Theory and RSA PublicKey Encryption
Number Theory and RSA PublicKey Encryption Dr. Natarajan Meghanathan Associate Professor of Computer Science Jackson State University Email: natarajan.meghanathan@jsums.edu CIA Triad: Three Fundamental
More informationUnderstand the TLS handshake Understand client/server authentication in TLS. Understand session resumption Understand the limitations of TLS
Last Updated: Oct 31, 2017 Understand the TLS handshake Understand client/server authentication in TLS RSA key exchange DHE key exchange Explain certificate ownership proofs in detail What cryptographic
More informationCryptography and Network Security Chapter 16. Fourth Edition by William Stallings
Cryptography and Network Security Chapter 16 Fourth Edition by William Stallings Chapter 16 IP Security If a secret piece of news is divulged by a spy before the time is ripe, he must be put to death,
More informationLecture 3: Symmetric Key Encryption
Lecture 3: Symmetric Key Encryption CS996: Modern Cryptography Spring 2007 Nitesh Saxena Outline Symmetric Key Encryption Continued Discussion of Potential Project Topics Project proposal due 02/22/07
More informationCRYPTOGRAPHY AND NETWORK SECURITY
CRYPTOGRAPHY AND NETWORK SECURITY PRINCIPLES AND PRACTICE FIFTH EDITION William Stallings Prentice Hall Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai
More informationChapter 8 Web Security
Chapter 8 Web Security Web security includes three parts: security of server, security of client, and network traffic security between a browser and a server. Security of server and security of client
More informationApplied Cryptography Protocol Building Blocks
Applied Cryptography Protocol Building Blocks Sape J. Mullender Huygens Systems Research Laboratory Universiteit Twente Enschede 1 Protocols An algorithm describes a series of steps carried out by a process
More informationLet's Encrypt  Free SSL certificates for the masses. Pete Helgren Bible Study Fellowship International San Antonio, TX
Let's Encrypt  Free SSL certificates for the masses Pete Helgren Bible Study Fellowship International San Antonio, TX Agenda Overview of data security Encoding and Encryption SSL and TLS Certficate options
More informationISACA CISA. ISACA CISA ( Certified Information Systems Auditor ) Download Full Version :
ISACA CISA ISACA CISA ( Certified Information Systems Auditor ) Download Full Version : http://killexams.com/pass4sure/examdetail/cisa QUESTION: 390 Applying a digital signature to data traveling in a
More informationThe most important development from the work on publickey cryptography is the digital signature. Message authentication protects two parties who
1 The most important development from the work on publickey cryptography is the digital signature. Message authentication protects two parties who exchange messages from any third party. However, it does
More information1. Out of the 3 types of attacks an adversary can mount on a cryptographic algorithm, which ones does differential cryptanalysis utilize?
Introduction Answer the following questions. When a word count restriction is given for a question, exceeding it will result in marks being deducted. If your answer is more than twice the maximum length,
More informationIntroduction to Cyber Security Week 2: Cryptography. Ming Chow
Introduction to Cyber Security Week 2: Cryptography Ming Chow (mchow@cs.tufts.edu) Twitter: @0xmchow Learning Objectives By the end of this week, you will be able to: Understand the difference between
More informationDistributed Systems Principles and Paradigms. Chapter 09: Security
Distributed Systems Principles and Paradigms Christoph Dorn Distributed Systems Group, Vienna University of Technology c.dorn@infosys.tuwien.ac.at http://www.infosys.tuwien.ac.at/staff/dorn Slides adapted
More informationCS 332 Computer Networks Security
CS 332 Computer Networks Security Professor Szajda Last Time We talked about mobility as a matter of context: How is mobility handled as you move around a room? Between rooms in the same building? As your
More informationIBM. Security Cryptography. System i. Version 6 Release 1
IBM System i Security ryptography Version 6 Release 1 IBM System i Security ryptography Version 6 Release 1 Note Before using this information and the product it supports, read the information in Notices,
More informationChapter 11 Message Integrity and Message Authentication
Chapter 11 Message Integrity and Message Authentication Copyright The McGrawHill Companies, Inc. Permission required for reproduction or display. 11.1 Chapter 11 Objectives To define message integrity
More informationEncryption Algorithms
Encryption Algorithms 1. Transposition Ciphers 2. Substitution Ciphers 3. Product Ciphers 4. Exponentiation Ciphers 5. Cryptography based on Discrete Logarithms 6. Advanced Encryption Standard (AES) 1.
More informationChapter 9. Public Key Cryptography, RSA And Key Management
Chapter 9 Public Key Cryptography, RSA And Key Management RSA by Rivest, Shamir & Adleman of MIT in 1977 The most widely used publickey cryptosystem is RSA. The difficulty of attacking RSA is based on
More informationSummary of PGP Services
Table 15.1 Summary of PGP Services Function Algorithms Used Description Digital signature Message encryption Compression Email compatibility DSS/SHA or RSA/SHA CAST or IDEA or Threekey Triple DES with
More informationModule 1: Classical Symmetric Ciphers
Module 1: Classical Symmetric Ciphers Dr. Natarajan Meghanathan Professor of Computer Science Jackson State University Email: natarajan.meghanathan@jsums.edu Introduction to Cryptography Terms and Concepts
More informationCryptography & Key Exchange Protocols. Faculty of Computer Science & Engineering HCMC University of Technology
Cryptography & Key Exchange Protocols Faculty of Computer Science & Engineering HCMC University of Technology Outline 1 Cryptographyrelated concepts 2 3 4 5 6 7 Key channel for symmetric cryptosystems
More informationCryptography: More Primitives
Design and Analysis of Algorithms May 8, 2015 Massachusetts Institute of Technology 6.046J/18.410J Profs. Erik Demaine, Srini Devadas and Nancy Lynch Recitation 11 Cryptography: More Primitives 1 Digital
More informationAuthenticating on a Ham Internet
Authenticating on a Ham Internet The FCC regulations for amateur radio, part 97, rule that encryption cannot be used to obscure the meaning of communications. Many read the rules and assume that there
More informationSecurity in ECE Systems
Lecture 11 Information Security ECE 197SA Systems Appreciation Security in ECE Systems Information security Information can be very valuable Secure communication important to protect information Today
More informationVerteilte Systeme (Distributed Systems)
Verteilte Systeme (Distributed Systems) Lorenz Froihofer l.froihofer@infosys.tuwien.ac.at http://www.infosys.tuwien.ac.at/teaching/courses/ VerteilteSysteme/ Security Threats, mechanisms, design issues
More informationTextbook: Ahmet Burak Can Hacettepe University. Supplementary books:
Basic Ciphers Ahmet Burak Can Hacettepe University abc@hacettepe.edu.tr Books Textbook: Network Security: Private Communication in a Public World, 2nd Edition. C. Kaufman, R. Perlman, and M. Speciner,
More informationThe Application of Elliptic Curves Cryptography in Embedded Systems
The Application of Elliptic Curves Cryptography in Embedded Systems Wang Qingxian School of Computer Science and Engineering University of Electronic Science and Technology China Introduction to Cryptography
More informationClassical Encryption Techniques. CSS 322 Security and Cryptography
Classical Encryption Techniques CSS 322 Security and Cryptography Contents Terminology and Models Requirements, Services and Attacks Substitution Ciphers Caesar, Monoalphabetic, Polyalphabetic, Onetime
More informationSecret Key Algorithms (DES)
Secret Key Algorithms (DES) G. Bertoni L. Breveglieri Foundations of Cryptography  Secret Key pp. 1 / 34 Definition a symmetric key cryptographic algorithm is characterized by having the same key used
More informationOracle Tuxedo. Using Security in CORBA Applications 11g Release 1 ( ) March 2010
Oracle Tuxedo Using Security in CORBA Applications 11g Release 1 (11.1.1.1.0) March 2010 Oracle Tuxedo Using Security in CORBA Applications, 11g Release 1 (11.1.1.1.0) Copyright 1996, 2010, Oracle and/or
More informationCryptography and Network Security. Sixth Edition by William Stallings
Cryptography and Network Security Sixth Edition by William Stallings Chapter 19 Electronic Mail Security Despite the refusal of VADM Poindexter and LtCol North to appear, the Board's access to other sources
More information