Hybrid Symmetric Cryptography

This book introduces a concept of Hybrid cryptography, switch from the static to dynamic keys. The term hybrid is concern with the combination of substitution and transposition techniques. This book introduces a new dynamic symmetric cryptography technique. The book presents an introduction to symmetric, asymmetric cryptography techniques block cipher crypt analysis and stream cipher crypt analysis. This book is useful especially for the researchers in the field of cryptography and for undergraduate and graduate level.