InhaltsangabePart I: Channel coding. Error-control codes. Check digits for error detection.- Part II: Source codes. Statistical methods. Dictionary methods. Image compression.- Part III: Secure codes. Basic concepts. Monoalphabetic substitution ciphers. Transposition ciphers. Polyalphabetic substitution ciphers. Stream ciphers. Block ciphers. Public-key cryptography. Data hiding. Data hiding in images. Other methods of data hiding.- Part IV: Essential resources.- Glossary.- Appendixes.- Bibliography.- Answers to exercises.- Index.