trusted system in cryptography and network security ppt

Tài liệu Cryptography and Network Security Principles and Practices, Fourth Edition ppt

... areexplored in Part Four. Cryptography and Network Security Principles and Practices, Fourth Edition32 / 526 This increase in attacks coincides with an increased use of the Internet and with increases ... range of concerns of network security. [Page 9]Internetwork security is both fascinating and complex. Some of the reasons follow:1. Security involving communications and networks is not as simple ... Cryptosystem[View full size image] Cryptography and Network Security Principles and Practices, Fourth Edition37 / 526 ã Table ofContentsã Index Cryptography and Network Security Principles...

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Cryptography and Network Security Chapter 6 pptx

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... blocks being independent blocks being independent main use is sending a few blocks of data main use is sending a few blocks of data Cryptography and Cryptography and Network Security Network ... Cipher Block Chaining (CBC) Cipher Block Chaining (CBC) message is broken into blocks message is broken into blocks linked together in encryption operation linked together in encryption ... equivalent in security nb encrypt & decrypt equivalent in security if if K1=K2K1=K2 then can work with single DES then can work with single DESstandardized in ANSI X9.17 & ISO8732standardized...

Cryptography and Network Security Chapter 7 pptx

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... Natural Random NoiseNatural Random Noisebest source is natural randomness in real world best source is natural randomness in real world find a regular but random event and monitor find a ... (PRNGs)”(PRNGs)” Cryptography and Cryptography and Network Security Network Security Chapter 7Chapter 7Fourth EditionFourth Editionby William Stallingsby William StallingsLecture slides ... Random NumbersRandom Numbersmany uses of many uses of random numbersrandom numbers in cryptography in cryptography nonces in authentication protocols to prevent replaynonces in...

Cryptography and Network Security Chapter 10 pptx

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... secret keys Cryptography and Cryptography and Network Security Network Security Chapter 10Chapter 10Fourth EditionFourth Editionby William Stallingsby William StallingsLecture slides ... significant load in storing and processing keys and messages and processing keys and messagesan alternative is to use elliptic curvesan alternative is to use elliptic curvesoffers same security ... participants (and value of key depends on the participants (and their private and public key information) their private and public key information) based on exponentiation in a finite (Galois)...

CRYPTOGRAPHY AND NETWORK SECURITY: Principles and Practice pptx

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CRYPTOGRAPHY AND NETWORK SECURITY PRINCIPLES AND PRACTICE FOURTH EDITION pptx

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Cryptography and network security principles and practice, 5th edition

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Cryptography and Network Security docx

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... plain text into blocks and encrypt each independently●Properties required:–No bit of plain text should appear directly in cipher text–Changing even one bit in plain text should result in ... key systems:–RSA: based on difficulty of factoring–Galois-Field (GF) system: based on difficulty of finding logarithm–Based on knapsack problem Fundamentals of Wired and Wireless Networks, ... K1 again) Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09-13 May 2005Some Non-Crypto Attacks●Man -in- the-middle attack: play a trick by being in the...

Cryptography and Network Security Chapter 1 doc

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... ArchitectureITU-T X.800 Security Architecture for OSI”ITU-T X.800 Security Architecture for OSI”defines a systematic way of defining and defines a systematic way of defining and providing security requirementsproviding ... Brown Security Service Security Serviceenhance security of data processing systems enhance security of data processing systems and information transfers of an organization and information ... considered:definitions for: definitions for: ãcomputer, network, internet security computer, network, internet security X.800 standardX.800 standard security attacks, services, mechanisms security attacks,...

Cryptography and Network Security Chapter 2 pdf

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... ciphertextselect plaintext and obtain ciphertextchosen ciphertext select ciphertext and obtain plaintextselect ciphertext and obtain plaintextchosen text select plaintext or ciphertext ... since the ciphertext provides broken since the ciphertext provides insufficient information to uniquely insufficient information to uniquely determine the corresponding plaintext determine ... encryptedwith 3 cylinders have 263=17576 alphabets Encrypting and DecryptingEncrypting and Decryptingplaintext is encrypted two letters at a time 1.1.if a pair is a repeated letter, insert if...

Cryptography and Network Security Chapter 8 doc

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... numbersFermat’s and Euler’s Theorems & Fermat’s and Euler’s Theorems & ø(n)ø(n) Primality TestingPrimality TestingChinese Remainder TheoremChinese Remainder TheoremDiscrete ... in public key and primality testinguseful in public key and primality testing Discrete LogarithmsDiscrete Logarithmsthe inverse problem to exponentiation is to find the inverse problem ... Chinese Remainder theorem lets us work Chinese Remainder theorem lets us work in each moduli m in each moduli mi i separately separately since computational cost is proportional to since...

Cryptography and Network SecurityChapter 9 doc

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...  Cryptography and Cryptography and Network Security Network Security Chapter 9Chapter 9Fourth EditionFourth Editionby William Stallingsby William StallingsLecture slides ... compute , hence compute ø(n)ø(n) and then d and then ddetermine determine ø(n)ø(n) directly and directly and compute compute ddfind d directlyfind d directlyhave ... Public-Key CryptosystemsPublic-Key Cryptosystems SummarySummary&&principles of public-key cryptography principles of public-key cryptography RSA...

Cryptography and Network Security potx

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... described several methods in 1200s CS595 -Cryptography and Network Security Cryptography and Network Security Xiang-Yang Li CS595 -Cryptography and Network Security IntroductionThe art of war ... converting plaintext to ciphertext! Decipher (decode)" The process of converting ciphertext back into plaintext CS595 -Cryptography and Network Security Attack: Interception CS595 -Cryptography ... Security Information Transferring CS595 -Cryptography and Network Security Cryptography ! Cryptography is the study of " Secret (crypto-) writing (-graphy) ! Concerned with developing algorithms:...

Cryptography and Network Security: Overview potx

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... University in St. Louis Cryptography and Cryptography and Network Security: Overview Network Security: OverviewRaj Jain Washington University in Saint LouisSaint Louis, MO 63130Jain@cse.wustl.eduAudio/Video ... OSI Security Architecture for OSI””Defines a systematic way of defining and providing Defines a systematic way of defining and providing security requirements security requirementsProvides ... 1-6â2011 Raj JainCSE571SWashington University in St. LouisAspects of Security Aspects of Security Aspects of information security: Aspects of information security:  Security attackSecurity...

Cryptography and Network Security Chapter 13 pot

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... disputeshence include authentication function with hence include authentication function with additional capabilitiesadditional capabilities Cryptography and Cryptography and Network Security Network ... signature in storagebe practical save digital signature in storage Denning AS ProtocolDenning AS ProtocolDenning 81 presented the following:Denning 81 presented the following:1. 1. ... are permitted to mingle freely with at least before they are permitted to mingle freely with the inhabitants, certain ceremonies are often performed the inhabitants, certain ceremonies are...