We prepared some powerpoint slides that you might find helpful as the basis for class or a maths club activities, so please download them and let us know what you think. If you have any suggestions to improve them and are happy for us to use your suggestions let us know in the suggestions page on the forum.
You might also find the notes on codebreaking and programming are useful.
The Caesar shift cipher and pattern detection Powerpoint slides
Frequency analysis Powerpoint slides
The affine shift cipher Powerpoint slides
Breaking the affine shift cipher using modular inverses Powerpoint slides
The keyword cipher Powerpoint slides
Cracking a keyword cipher using frequency analysis and cribs Powerpoint slides
Programming for Cryptologists 101 pdf, by Julian Bhardwaj
A beginner’s guide to codebreaking pdf, by Graham A. Niblo