Taking the mystery out of learning cryptography

You are probably here... 

...to get our free cryptography book because you want or need to learn the basics of computer cryptography. 

A few years ago Hx needed to design cryptography into a computer system. Since he couldn't find a book from which to quickly learn the basics, he drew pictures to teach himself the key concepts. 

Cryptography Decrypted readers on Amazon  say Hx and Doris' pictures and text have taken the mystery out of learning cryptography - a tool  to help protect the web and everyone's personal information.