Key Stage 3

Arranged by Year group:

  • Year 7
  • Year 8
  • Year 9

Arranged by strand:

  • Algebra (x)
  • Data Handling (x)
  • Geometry (x)
  • Number (x)
GCSE

Arranged by Year group:

  • Year 10
  • Year 11

Arranged by strand:

  • Algebra (x)
  • Data Handling (x)
  • Geometry (x)
  • Number (x)
A-Level

AS-Level Mathematics

  • Pure Mathematics
  • Mechanics (x)
  • Statistics (x)

A-Level Mathematics

  • Pure Mathematics (x)
  • Mechanics (x)
  • Statistics (x)

AS-Level Further Mathematics

A-Level Further Mathematics

Enrichment
  • Codes and Ciphers
SAT's
encaesar

:

Homepage:

Codes and Ciphers: The Caesar Shift Wheel

The easiest way to calculate the letters to substitute is to create a Caesar shift wheel. To do this, download the Caesar wheel template and follow the instructions.

pdf The Caesar Shift Wheel Template

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Then to calculate the substitution letters desired, simply rotate the inner circle to the left by the number of sections required by the shift. The diagram below shows a shift of 3.

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know if you are encountering problems with this site.

You can then manually decipher or encipher a message. Of course it is quicker to decipher or encipher Caesar shift ciphers using a computer and an encipher/decipher tool, but that does take some of the fun out of it!

Further Information

Creating a Caesar shift cipher

  • About the Caesar shift cipher.

Deciphering a Caesar shift cipher

  • Using the Vigenere square.
  • Using frequency analysis.
  • Caesar shift cipher encipher/decipher tool.