Welcome to Crypto Corner

This website is dedicated to explaining clearly how a variety of codes and ciphers work, how to use them to both encrypt and decrypt a message, and how to use methods to help break a code that you have intercepted.

The site is very much a work in progress at the moment, with many of the sections still under construction. The first five sections are now complete, with a full introduction to Monoalphabetic Substitution Ciphers and also to Simple Transposition Ciphers. You can also learn all about Polyalphabetic Substitution Ciphers and Fractionating Ciphers. For even more complex ciphers, Digraph Substitution Ciphers are also live on the site. I will be updating the site as often as I can, so keep checking back for updates.

For each cipher, there is a detailed description of how the cipher works, and a little bit of history, and also examples of the cipher in use, some questions for you to attempt, and an activity to perform the cipher (this can be used to check your answers to the questions or to make your own encrypted messages).

Along the top of the page you have the navigation bars, which you can use at any point to access information on any given code. It is recommended that you start at the beginning, and work your way through the list, since they get harder and more complicated as we progress through them.

There is also a Glossary of terms used throughout the site. If you come across a word and you cannot remember what it means, then this is the place to look.

As much as this site is provided for information, I am also a teacher and have used Cryptography in the classroom several times. There is an Educational Uses page with ideas for this, and a Downloadable Resources page with a selection of materials I have made and used successfully.

I hope you find this site useful and informative, and any comments are welcomed via the Contact Me page.