'Stream cipher' diaporamas de présentation

Chapter 8: Cryptography

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Securities in Domestic and Cross-border Data exchange

Securities in Domestic and Cross-border Data exchange . 2012. 5. Security Issue. Security Issue. paperless trade process need electronic data exchanges. cross domain, cross border data exchanges need secure, standard, technology-neutral interface

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E-Commerce Architectures and Technologies

E-Commerce Architectures and Technologies. Rob Oshana Southern Methodist University. Cryptography. Security Service Layers. Non-repudiation. Data Integrity. Data Confidentiality. Access Control. Authentication. Authentication. Typically the first step to gain access to a system

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Chapter 3 Symmetric Key Crypto

Chapter 3 Symmetric Key Crypto. Stream Ciphers Block Ciphers Block Cipher Modes Integrity. Symmetric Key Crypto. Stream cipher ? like a one-time pad Key is relatively short Key is stretched into a long keystream Keystream is then used like a one-time pad except provable security

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IEEE C802.20-04/ 56r1

IEEE C802.20-04/ 56r1. IEEE C802.20-04/33. On Security Issues In Wireless Communications Systems. Mithat C. Dogan ArrayComm, Inc. 2480 North First Street, Suite 200. San Jose, CA 95131-1014. Agenda. Agenda. Review symmetric key encryption algorithms:

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Lecture 02 Symmetric Cryptography 1

Lecture 02 Symmetric Cryptography 1. Dr. Supakorn Kungpisdan supakorn@mut.ac.th. Roadmap. Overview of Cryptography Types of Cryptography Symmetric Cryptography Classical Cryptographic Techniques Block Ciphers Modern Cryptographic Techniques. Basic Terminology.

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Classical Cryptography

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Cryptography

Cryptography. CISSP Guide to Security Essentials Chapter 5. Objectives. Applications and uses of cryptography Encryption methodologies Cryptanalysis Management of cryptography Key management. Applications and Uses of Cryptography. What Is Cryptography.

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Encipherment Using Modern Symmetric-Key Ciphers

Encipherment Using Modern Symmetric-Key Ciphers. Objectives. ? To show how modern standard ciphers, such as DES or AES, can be used to encipher long messages. 8-1 USE OF MODERN BLOCK CIPHERS.

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Network Security Essentials Chapter 2 Symmetric Encryption and message confidentiality

Network Security Essentials Chapter 2 Symmetric Encryption and message confidentiality. Agenda. Symmetric encryption principles Symmetric block encryption algorithms DES, 3DES, AES Random and pseudorandom numbers Streaming ciphers RC4 Cipher block modes of operation.

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Crypto weakness in popular Web A pplications

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Encryption

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Stream Ciphers

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Stream Ciphers

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RC4

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Stream Cipher

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Cryptanalysis on Clock Controlled Stream Ciphers

Cryptanalysis on Clock Controlled Stream Ciphers. Shinsaku Kiyomoto KDDI R&D Laboratories Inc. 2005.2.22. This is a joint work with Kyushu University (Prof. Kouichi Sakurai). Information about Myself. Shinsaku Kiyomoto (age 29) B.E. and M.E. from Tsukuba Univ. (1998 and 2000)

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Pseudorandom Number Generation and Stream Ciphers

Pseudorandom Number Generation and Stream Ciphers. Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu Audio/Video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse571-11/. Overview. Principles of Pseudorandom Number Generation

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One-Time Pad Or Vernam Cipher

One-Time Pad Or Vernam Cipher. Sayed Mahdi Mohammad Hasanzadeh Hasanzadeh@Raymandcrypto.ir Spring 2004. OTP System. The one-time pad, which is a provably secure cryptosystem, was developed by Gilbert Vernam in 1918.

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Block Cipher Modes

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