This is an archived page. It's probably got quite a lot of old stuff on it and may be quite out of date.
Codebreakers
This stuff isn't right yet. It all needs some work and there be other resources around the place that I need to add in.
1 – Substitution ciphers
Slides – web version
Slides – my version to use with some answers...
Pup Kag code – sheet
Pup Kag code – slides
A to Z program – runs in Python
An online substitution cipher solver
2 – More ciphers
Letter frequency analysis - useful information for solving codes such as PUP KAG
Text analysis tool - will report letter frequency in a given phrase
Videos page - morse and semaphore
To add
- Nelson flag signals
- Caesar solver
- Flowol lighthouse morse code
3 – Caesar ciphers
4 – Steganography
Hints for steganography task (and solution)
