Secret Code Book

The Secret Code Book is a gentle introduction to substitution ciphers where each chapter eases young readers into the concept of rotation ciphers and work their way up to the Vigenère cipher. Along the way, readers will also learn about geometric approaches to secret codes such as the Pigpen cipher as well as a rich history behind the subject. As a bonus, there is a brief description of frequency analysis and how it is used to crack secret codes!

frper gpbqr obbx

In addition, this book actively challenges readers with practice missions where answers are listed in the back. Be sure to find the a cut-out rotation template that is provided to make your very own cipher disk! After reading this book, you will have all the basic tools needed to create secret messages.

For those willing to learn.

John Redden

It’s exciting to come across a topic that is so rich, historically important and essential in modern everyday life. The subject of secret codes and ciphers involves creative thinking, and at the same time it stimulates analytical thought and precision. All this while being fun…

After all, who doesn’t like secret messages?

My hope and dream is that by reading this book you are encouraged to explore more codes and ciphers as well as the stories behind the men and women that have worked in this field. To that end, this book is dedicated to those with the curiosity to imagine and learn. — John Redden




Professor and Author

Love podcasts or audiobooks? Learn on the go with our new app.

Recommended from Medium

The CIA uses the FBI’s vast NGI Biometric Identification system

How to file a GDPR complaint against MUIC in four easy steps

#3wordsbetterthanIloveyou: walk in closet

{UPDATE} 刘备磕头2 - 挂机休闲手游 Hack Free Resources Generator

On Cyberwarfare & the Effectiveness of Indicting Foreign Criminal Hackers

Using MDATP Streaming API with Misp

Practical Ransomware Prevention Techniques & Practices That Won’t Break the Bank

Cryptomining Tool ‘Victor’ —Advertised as Onion DDoS Tool on Dark Web

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
John Redden

John Redden

Professor and Author

More from Medium

Simple Proof That Equilateral Triangle Has the Maximum Area Among All Triangles Inscribed in a…

How close are the rationals and irrationals and what is the “most irrational number”?

Five free resources to get you started with the Lean Theorem Prover

A Satisfying Chess Puzzle