I. What is Cryptography? Do you have a message which is so confidential that you need to send to a certain person but you’re afraid that somebody might read it? Well you better study about CRYPTOGRAPHY. But first what is cryptography? Cryptography is the study of hiding readable messages (plaintext) into a non-readable form (ciphertext). Based on my other source Cryptography is the practice and study of techniques for secure communication in the presence of third parties. To make it simple‚ Cryptography
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Cryptography is the science of converting data into a secret code to hide the meaning of the message during transmission. Cryptographic systems provide the following security services: • Confidentiality‚ by ensuring that only authorized parties can access data. • Integrity‚ by verifying that data has not been altered in transit. • Authentication‚ by proving the identity of the sender or receiver. • Non-repudiation‚ by validating that communications have come from a particular sender at a particular
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Chapter 5: Cryptography Objectives: - Applications and uses of cryptography - Encryption methodologies - Cryptanalysis - Management of Cryptography - Key Management Application and uses of Cryptography What is Cryptography? Cryptography is the science of hiding information in plain sight‚ in order to conceal it from unauthorized parties. - Substitution cipher first used by Caesar for battlefield communications Encryption Terms and Operations • Plaintext – an original message •
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cryptanalytic concepts. CrypTool implements more than 200 algorithms. In CrypTool‚ users are able to adjust the parameters to their own specific needs. Cryptool introduces the user to the field of cryptography. Classical ciphers alongside with asymmetric cryptography‚ to include RSA‚ elliptic curve cryptography‚ digital signatures‚ homomorphic encryption‚ and Diffie-Hellman key exchange. CrypTool also contains some didactical games‚ and an animated tutorial about primes and elementary number theory (Cryptool
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INTRODUCTION TO CRYPTOGRAPHY INTRODUCTION Cryptography is the branch of science that deals with data security relating to encryption and decryption. This science has been in existence about 4000 years ago with its initial and limited use by the Egyptians‚ to the twentieth century where it played a crucial role in the outcome of both world wars. Cryptography was used as a tool to protect national secrets and strategies. DES‚ the Data Encryption Standard‚ is an adoption with the Federal Information
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In the history of cryptography‚ the Enigma was a portable cipher machine used to encrypt and decrypt secret messages. More precisely‚ Enigma was a family of related electro-mechanical rotor machines comprising a variety of different models. The Enigma was used commercially from the early 1920s on‚ and was also adopted by the military and governmental services of a number of nations most famously by Nazi Germany before and during World War II. The German military model‚ the Wehrmacht Enigma
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The decrypted telegram says the following: “We intent to begin on the first of February unrestricted submarine warfare. We shall endeavor in spite of this to keep United States of America neutral. In the event of this not succeeding‚ we make Mexico a proposal of alliance on the following basis: make war together‚ make peace together‚ generous financial support and an understanding on our part that Mexico is to reconquer the lost territory in Texas‚ New Mexico‚ and Arizona. The settlement in detail
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Abstract This paper gives an introduction to elliptic curve cryptography (ECC) and how it is used in the implementation of digital signature (ECDSA) and key agreement (ECDH) Algorithms. The paper discusses the implementation of ECC on two finite fields‚ prime field and binary field. It also gives an overview of ECC implementation on different coordinate systems called the projective coordinate systems. The paper also discusses the basics of prime and binary field arithmetic. This paper also discusses
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THE WILLIAM STALLINGS BOOKS ON COMPUTER DATA AND COMPUTER COMMUNICATIONS‚ EIGHTH EDITION A comprehensive survey that has become the standard in the field‚ covering (1) data communications‚ including transmission‚ media‚ signal encoding‚ link control‚ and multiplexing; (2) communication networks‚ including circuit- and packet-switched‚ frame relay‚ ATM‚ and LANs; (3) the TCP/IP protocol suite‚ including IPv6‚ TCP‚ MIME‚ and HTTP‚ as well as a detailed treatment of network security. Received the 2007
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Cryptography and Network Security Principles and Practices‚ Fourth Edition By William Stallings Publisher: Prentice Hall Pub Date: November 16‚ 2005 Print ISBN-10: 0-13-187316-4 Print ISBN-13: 978-0-13-187316-2 eText ISBN-10: 0-13-187319-9 • Table of Contents • Index eText ISBN-13: 978-0-13-187319-3 Pages : 592 In this age of viruses and hackers‚ of electronic eavesdropping and electronic fraud‚ security is paramount. As the disciplines of cryptography and network security have matured‚ more
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