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Chapter 8: Cryptography

Chapter 8: Cryptography

Brian E. Brzezicki. Chapter 8: Cryptography. Cryptography (665). Cryptography – science of encrypting information. “scrambles” data so only authorized parties can “unscramble” and read data. Basic Idea. Cryptography (665). How do we scramble data? Substitution (confusion)

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2.05k views • 163 slides
Unit -1

Unit -1

Unit -1. Triple DES. Triple DES. 3DES was first Standardized for use in financial application in ANSI standard X9.17 in 1985 3DES uses three keys and three executions of DES algorithm . The Function Follows (EDE) Encrypt – Decrypt – Encrypt. C= E(K 3 ,D(K 2 ,E(K 1 ,P))) WHERE

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610 views • 49 slides
CS363

CS363

Week 12 - Wednesday. CS363. Last time. What did we talk about last time? Making a business case for security Quantifying security. Questions?. Project 3. Security alert: Heartbleed.

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467 views • 33 slides
Network Security

Network Security

Network Security. Lecture 4 Modes of Operation http://web.uettaxila.edu.pk/CMS/coeCCNbsSp09/index.asp. Waleed Ejaz waleed.ejaz@uettaxila.edu.pk. Overview. Modes of Operation: ECB, CBC, OFB, CFB, CTR Privacy + Integrity DES Attacks 3DES and its design Ref: Chapter 4 of textbook.

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579 views • 32 slides
Chapter 4: Modes of Operation

Chapter 4: Modes of Operation

Chapter 4: Modes of Operation. CS 472: Fall 2012. Encrypting a Large Massage. Electronic Code Book (ECB) Cipher Block Chaining (CBC) Output Feedback Mode (OFB) Cipher Feedback Mode (CFB ). Electronic Code Book (ECB).

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389 views • 23 slides
Introduction to Cryptography

Introduction to Cryptography

Introduction to Cryptography. Based on: William Stallings, Cryptography and Network Security. Chapter 6. Block Cipher Operation Modes. Double DES. Meet-in-the-Middle Attack. Meet-in-the-Middle Attack. Given a plaintext- ciphertext pair :

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261 views • 20 slides

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