Visuals / resources / decorations:

A strip of paper/ cardboard with the alphabet printed and cuts below, through which a second strip with the alphabet can be fitted and pulled to the left or right. /How long should it be? We can make it from A3 paper glued together/
A poster with the Alphabet and the number values of each letter, i.e. A=1, B=2, C=3 etc.
ASCII table
Braille poster with Braille alphabet and [a challenge to solve](Visuals/Braille challenge.png)
Vigenere square poster: good-looking example just as an idea what the poster should look like and a usable file in terms of size and usage rights
A poster with an example of Vigenere cipher with a keyword, e.g. code
Pigpen / Masonic cipher poster It's not labelled for reuse so we might need to create our own with this image
SHA-256 poster: /don't know if we need it. Shall we go all the way to hash algorithms? But I love the text/

Why is 2^256 secure?

What exactly is 2^256? Well, if we’re being technical…

2256 = 115792089237316195423570985008687907853269984665640564039457584007913129639936

There is a 1 in over 115 quattuorvigintillion (that’s a 78-digit number) chance of hash collision.

Resources / Materials:

paper plates/ cardboard cut in circles
scissors
rulers for drawing segments for letters, alternatively protractors (Can we borrow them from somewhere?)
pins for the cipher wheels
flipchart / whiteboard
Vigenere square printed on A4 sheets groups of kids (Age 13-15) can use to encrypt their messages
Printouts with cryptography self-study resources (the links at the end of the instructions document);
printouts of decryption tasks;
printouts of frequency analysis texts for different groups: EN/FR/DE/LU (and ages 11-13/14+ if needed);
printouts with instructions for the different age groups /how many copies per group?/

examples of different cyphers: reverse alphabet, pigpen, Affine, etc.