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Description

Demonstrate Caeser cyphers.
Make cypher/code wheels to create and code cryptic messages.

Resources

Craft card (two contrasting colours works well)
Two discs cut from the card: one approx. 10cm, one approx. 12 cm diameter.
Brass paper fastener (or paper clip + tape; string + tape)
Pencil

Instructions

On the large disc:
- mark A (at 12 o'clock)
- mark N (at 6 o'clock)
- draw dividing lines at 3 o'clock and 9 o'clock
- divide the remaining space again.
- Enter three letters into each space created eg: BCD, EFG until all the letters are entered.
Make holes in the centre of the discs and secure with the brass paper fastener.
On the smaller disc:
- enter the letters of the alphabet again on the smaller disc,
- Be careful to line up the letters with the outer letters.

ALTERNATIVE INSTRUCTIONS: see "Secret Cypher" PDF
This version has the alphabet around the edge of the inner disc and pictograms around the edge of the outer disc.

USE THE WHEEL:
When you write a message move the disc 5 characters clockwise (for example) and use the corresponding letters to replace the usual ones. Ensure the person receiving the message has a corresponding cipher wheel and knows how many characters the shift.

Thank you to the "dangerous book for boys" by Gonn Iggulden

Tags

• Ceaser
• ciphers
• codes
• communicator
• cryptic
• decode
• message
• paper craft
• Wheel

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