Classic Cryptography

Abstract

Chapters 1 and 2 cover information on classic cryptography and the aspects of information security related to security services and mechanisms. The history of cryptography and code-breaking is very interesting and, in this chapter, some of the types of implementation employed over the centuries to attempt to code information are covered. These implementations are not very sophisticated by today’s standards and are considered too weak for serious applications. Some early crypto machines and the Vernam Cipher developed by Gilbert Vernam in 1917 are discussed in this chapter.