Introduction
The history of cryptography is very long and interesting. For a complete non-technical reference of cryptography, we recommend The Codebreakers [1]. The book presents cryptography from its initial use by the Egyptians around 4,000 years ago to recent history when it played a vital role in the outcome of both world wars. The book was written in 1963 and covers aspects of history that were significant in terms of the development of cryptography. Cryptography is seen as ...