[Download] Codes, Ciphers, Steganography & Secret Messages by Sunil Tanna ~ Book PDF Kindle ePub Free

Discover the science of cryptology! This book is a complete introduction to codes, ciphers and secret messages. You will discover:- How codes and ciphers work- How secret messages can be concealed in apparently innocuous messages (steganography)- How codebreakers and cryptanalysts break codes and ciphers- Many examples of how codes and ciphers have changed history and continue to shape the world to this dayTable of ContentsIntroduction: What are Codes, Ciphers and Steganography?Chapter 1: Codes used for CommunicationFlag CodeSemaphore CodePolybius SquareOptical Telegraph CodesElectrical Telegraph Codes- International Morse Code- Baudot Code- Murray Code and ITA 2- ASCIIComputer CodesChapter 2: Caesar CiphersUsing a Caesar CipherVariations of the Caesar Cipher- ROT13- ROT5- ROT18- ROT47- Avgad and AlbamBreaking Caesar CiphersChapter 3: Simple Substitution CiphersAtbash CipherSimple Alphabet Substitution CiphersSimple Symbolic Substitution Ciphers- Pigpen CipherBreaking Simple Substitution Ciphers- Frequency Analysis- CribsDefeating Frequency Analysis- Short Messages- Homophony- Null Characters- Other MethodsChapter 4: Transposition CiphersScytaleRail Fence CiphersRoute CiphersColumnar Transposition CiphersDouble Columnar Transposition CiphersMyszkowski Transposition CiphersDisrupted Transposition CiphersGrille Ciphers- Trellis Ciphers- Fleissner Ciphers- Crossword CiphersChapter 5: Fractionation and DiffusionBifid CipherTrifid CipherChapter 6: Polygraphic SubstitutionAdvantages and Disadvantages of Polygraphic CiphersPlayfair CipherTwo-Square CipherFour-Square CipherChapter 7: Polyalphabetic CiphersAlberti CipherTrithemius CipherVigenère CiphersBeaufort and Variant Beaufort CipherAutokey CiphersChapter 8: EnigmaThe Enigma MachineHow Enigma was Broken- Early British Efforts- Polish Cipher Bureau- Polish Cooperation with the Western Allies- PC Bruno- Cadix- British Efforts Against Italian Naval Enigma- The British Focus on Cribs- British and American Bombes- German SuspicionsChapter 9: Perfect CiphersVernam CipherOne-Time PadsDifficulties of Implementing a Perfect Cipher- Protecting the Key- Not Reusing the Key- Randomness in the Key- The Equipment Used Must Be SecureLorenz Cipher- Cryptanalysis of the Lorenz CipherChapter 10: CodewordsOne-time CodeNomenclatorMidwayChapter 11: Book CiphersBook Word Substitution CiphersBook Letter Substitution CiphersRunning Key CiphersChapter 12: Computer CryptographySymmetric-Key CryptographyPublic-Key CryptographyCryptographic Hashes and Digital SignaturesChapter 13: Steganography and Hidden MessagesNull CiphersBacon’s CipherGrillesDigital Steganography- Image Files- Audio Files- Text and Word Processor Files- Network Communications- Other ExamplesChapter 14: Famous Codes, Ciphers and Cryptograms – Solved and UnsolvedVoynich ManuscriptBabington Plot CiphersOlivier LevasseurShugborough InscriptionCopiale CipherThe Gold BugBeale CiphersRohonc CodexD'Agapeyeff CipherDorabella CipherZimmerman TelegramZodiac Killer CiphersKryptosThe Magic Words are Squeamish OssifrageRicky McCormick's Encrypted Notes Smithy CodeConclusion