Learning and Teaching for Mathematical Literacy

Supporting materials – 13G

Encoding with a secret key


This spreadsheet demonstrates a very simple scheme for encoding a message with a secret key. The spreadsheet alows you to edit the key or the message. Note that this example just illustrates the concept and wouldn't really be very secure.

Encoding with a “secret” key

Screenshot of spreadsheet demonstrating a simple keyword code – click to download the file

The simple spreadsheet examples on this page may be copied freely – but they are not secure!

Supporting material for the book Learning and Teaching for Mathematical Literacy by Hugh Burkhardt, Daniel Pead and Kaye Stacey (ISBN 9781032301174).

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