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Ch06

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Joe Christensen
Joe Christensen

The document summarizes several modern symmetric ciphers: Triple-DES was adopted as a replacement for DES to increase its key size against brute force attacks. Blowfish is a block cipher designed to have a simple structure and be fast on 32-bit CPUs. RC5 is a family of ciphers that can vary key size, data size, and number of rounds. RC4 is a proprietary stream cipher owned by RSA that is widely used in applications like SSL and WEP. It shuffles an internal state array using the key to generate a pseudorandom stream.

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Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown
Chapter 6 – Contemporary Symmetric Ciphers ,[object Object],[object Object]
Triple DES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why Triple-DES? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Triple-DES with Two-Keys ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Triple-DES with Three-Keys ,[object Object],[object Object],[object Object],[object Object]
Blowfish ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Blowfish Key Schedule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Blowfish Encryption ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Discussion ,[object Object],[object Object],[object Object]
RC5 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC5 Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC5 Key Expansion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC5 Encryption ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC5 Modes ,[object Object],[object Object],[object Object],[object Object],[object Object]
Block Cipher Characteristics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Stream Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Stream Cipher Properties ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC4 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC4 Key Schedule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC4 Encryption ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RC4 Security ,[object Object],[object Object],[object Object],[object Object],[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Ch06

  • 1. Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown
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