DESCRIPTIONS

Discover the science of cryptology! This book is a complete introduction to codes, ciphers and secret messages. You will discover:<BR>- How codes and ciphers work<BR>- How secret messages can be concealed in apparently innocuous messages (steganography)<BR>- How codebreakers and cryptanalysts break codes and ciphers<BR>- Many examples of how codes and ciphers have changed history and continue to shape the world to this day<BR><BR><B>Table of Contents</B><BR><BR><B>Introduction: What are Codes, Ciphers and Steganography?</B><BR><BR><B>Chapter 1: Codes used for Communication</B><BR>Flag Code<BR>Semaphore Code<BR>Polybius Square<BR>Optical Telegraph Codes<BR>Electrical Telegraph Codes<BR>- International Morse Code<BR>- Baudot Code<BR>- Murray Code and ITA 2<BR>- ASCII<BR>Computer Codes<BR><BR><B>Chapter 2: Caesar Ciphers</B><BR>Using a Caesar Cipher<BR>Variations of the Caesar Cipher<BR>- ROT13<BR>- ROT5<BR>- ROT18<BR>- ROT47<BR>- Avgad and Albam<BR>Breaking Caesar Ciphers<BR><BR><B>Chapter 3: Simple Substitution Ciphers</B><BR>Atbash Cipher<BR>Simple Alphabet Substitution Ciphers<BR>Simple Symbolic Substitution Ciphers<BR>- Pigpen Cipher<BR>Breaking Simple Substitution Ciphers<BR>- Frequency Analysis<BR>- Cribs<BR>Defeating Frequency Analysis<BR>- Short Messages<BR>- Homophony<BR>- Null Characters<BR>- Other Methods<BR><BR><B>Chapter 4: Transposition Ciphers</B><BR>Scytale<BR>Rail Fence Ciphers<BR>Route Ciphers<BR>Columnar Transposition Ciphers<BR>Double Columnar Transposition Ciphers<BR>Myszkowski Transposition Ciphers<BR>Disrupted Transposition Ciphers<BR>Grille Ciphers<BR>- Trellis Ciphers<BR>- Fleissner Ciphers<BR>- Crossword Ciphers<BR><BR><B>Chapter 5: Fractionation and Diffusion</B><BR>Bifid Cipher<BR>Trifid Cipher<BR><BR><B>Chapter 6: Polygraphic Substitution</B><BR>Advantages and Disadvantages of Polygraphic Ciphers<BR>Playfair Cipher<BR>Two-Square Cipher<BR>Four-Square Cipher<BR><BR><B>Chapter 7: Polyalphabetic Ciphers</B><BR>Alberti Cipher<BR>Trithemius Cip