'Monoalphabetic substitution ciphers' presentation slideshows

CIS/TCOM 551 Computer and Network Security Slide Set 3

CIS/TCOM 551 Computer and Network Security Slide Set 3. Carl A. Gunter Spring 2004. Basic Encryption. Monoalphabetic substitution ciphers Polyalphabetic substitution ciphers Transposition ciphers Other hiding techniques Stream versus block ciphers. Sender. Transmission Medium. Receiver.

1.47k views • 128 slides

CSCE 815 Network Security Lecture 3

CSCE 815 Network Security Lecture 3 . Data Encryption Standard (DES). Outline. Review classical cryptography Monoalphabetic Ciphers cryptanalysis using letter frequencies Playfair ciphers polyalphabetic ciphers transposition ciphers product ciphers and rotor machines

951 views • 78 slides

CS363

Week 2 - Wednesday. CS363. Last time. What did we talk about last time? Encryption Shift ciphers Transposition ciphers. Questions?. Security Presentation. Alexander Barrow. Substitution ciphers.

441 views • 28 slides

Information Security CS 526 Topic 2

319 views • 22 slides

Lec . 5 : History of Cryptologic Research II

178 views • 17 slides

CYPHER INDEX

CYPHER INDEX. Introduction Background Demo. INTRODUCTION. Cypher is a software toolkit designed to aid in the decryption of standard (historical) ciphers by providing statistical data and algorithmic analysis on encrypted messages.

152 views • 14 slides

Monoalphabetic Cipher

Monoalphabetic Cipher. Rather than just shifting the alphabet Could shuffle (jumble) the letters arbitrarily Each plaintext letter maps to a different random cipher text letter hence key is 26 letters long Plain: abcdefghijklmnopqrstuvwxyz Cipher: DKVQFIBJWPESCXHTMYAUOLRGZN

1.85k views • 11 slides