Codes from history

Steganography is a method of coding from history that involves the method of hiding a message in plain sight. This was done by camouflaging it as something else. There has been lots of examples in history where this has been done. One of the earliest examples is from 1499 when an important political book was disguised as a magic book by putting the text between the lines in invisible ink. This method can be used to hide files or other important messaged so other do not realised it is there. Only the intended receiver will know where to look.

This example could be used in a classroom activity. The students could write secret messages to each other using invisible ink and only the intended receiver knows how to find the message.

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