Front Matter -- Mainly Cryptography. Historical Introduction and the Life and Work of Claude E. Shannon -- Classical Ciphers and Their Cryptanalysis -- RSA, Key Searches, SSL, and Encrypting Email -- The Fundamentals of Modern Cryptography -- DES, AES and Operating Modes -- Elliptic Curve Cryptography (ECC) -- General and Mathematical Attacks in Cryptography -- Practical Issues in Modern Cryptography and Communications -- Mainly Information Theory. Information Theory and Its Applications -- Random Variables and Entropy -- Source Coding, Data Compression, Redundancy -- Channels, Capacity, the Fundamental Theorem -- Signals, Sampling, SNR, Coding Gain -- Ergodic and Markov Sources, Language Entropy -- Perfect Secrecy: the New Paradigm -- Shift Registers (LFSR) and Stream Ciphers -- The Genetic Code -- Mainly Error-Correction. Error-Correction, Haddamard, Block Designs and -rank -- Finite Fields, Linear Algebra, and Number Theory -- Introduction to Linear Codes -- Linear Cyclic Codes, Shift Registers and CRC -- Reed₆Solomon, MDS Codes, and Bruen-Thas-Blokhuis -- MDS Codes, Secret Sharing, Invariant Theory -- Key Reconciliation, Linear Codes, New Algorithms -- ASCII -- Shannon's Entropy Table -- Glossary -- Bibliography -- Index -- Wiley-Interscience Series in Discrete Mathematics and Optimization.