Secret Key Cryptography

1 Introduction

I have been doing cryptography for more than 50 years. I have learned a great deal in that time. In this book I try to pass along that knowledge to the next generation of cryptographers. Much of this is new discoveries, not found anywhere else in the literature.

I know that there are many cryptography books already available. If I want people to read my book, I need to offer ideas that other books don’t have, ideas other authors don’t know, or believe are impossible. I need to make the book SENSATIONAL. Here goes. I will

• Tell you in simple non-technical language how to construct an unbreakable cipher.

• Provide 140 ciphers that you can use as is. 30 of them are rated Unbreakable.

• Give you a set of tools and techniques so you ...