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Joe Christensen
Joe Christensen

The document summarizes classical encryption techniques, including: 1) Monoalphabetic ciphers which encrypt one letter to another but can be broken through frequency analysis of letters. 2) The Playfair cipher which encrypts digrams and provides more security than monoalphabetic ciphers. 3) Polyalphabetic ciphers like the Vigenère cipher which use multiple cipher alphabets to provide even stronger security.

Education
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Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown
Chapter 2 – Classical Encryption Techniques ,[object Object]
Symmetric Encryption ,[object Object],[object Object],[object Object],[object Object]
Basic Terminology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Symmetric Cipher Model
Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cryptography ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Cryptanalytic Attacks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Brute Force Search ,[object Object],[object Object],[object Object]
More Definitions ,[object Object],[object Object],[object Object],[object Object]
Classical Substitution Ciphers ,[object Object],[object Object]
Caesar Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Caesar Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cryptanalysis of Caesar Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Monoalphabetic Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Monoalphabetic Cipher Security ,[object Object],[object Object],[object Object],[object Object]
Language Redundancy and Cryptanalysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
English Letter Frequencies
Use in Cryptanalysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example Cryptanalysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Playfair Cipher ,[object Object],[object Object],[object Object],[object Object]
Playfair Key Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Encrypting and Decrypting ,[object Object],[object Object],[object Object],[object Object],[object Object]
Security of the Playfair Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Polyalphabetic Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Vigenère Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Aids ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Security of Vigenère Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kasiski Method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Autokey Cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
One-Time Pad ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Transposition Ciphers ,[object Object],[object Object],[object Object],[object Object]
Rail Fence cipher ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Row Transposition Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Product Ciphers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rotor Machines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Steganography ,[object Object],[object Object],[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],[object Object],[object Object]

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