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Fall 2012 COMP 4605/5605 Computer Networks

Fall 2012 COMP 4605/5605 Computer Networks

Cryptography and Network Security. Fall 2012 COMP 4605/5605 Computer Networks. Donghyun (David) Kim Department of Mathematics and Computer Science North Carolina Central University. Symmetric Encryption Public Key Cryptography Message Authentication and Hash Functions Hash Algorithms

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1.13k views • 93 slides
Network Security

Network Security

Network Security. Professor Adeel Akram. Modern Block Cyphers. Outline. Modern Block Cyphers Block vs. Stream Cyphers Block Cipher Principles Substitution-Permutation Ciphers Confusion and Diffusion Feistel Cipher Data Encryption Standard (DES) Advanced Encryption Standard

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664 views • 66 slides
Chapter 3 Block Ciphers and the Data Encryption Standard

Chapter 3 Block Ciphers and the Data Encryption Standard

Chapter 3 Block Ciphers and the Data Encryption Standard. Block vs Stream Ciphers. block ciphers process messages into blocks, each of which is then en/decrypted like a substitution on very big characters 64-bits or more

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763 views • 61 slides
NETWORK SECURITY

NETWORK SECURITY

NETWORK SECURITY. Lecture No 5. Transposition Ciphers. now consider classical transposition or permutation ciphers these hide the message by rearranging the letter order without altering the actual letters used

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501 views • 50 slides
Cryptography and Network Security

Cryptography and Network Security

Cryptography and Network Security. Chapter 3 – Block Ciphers and the Data Encryption Standard.

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520 views • 45 slides

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