If nobody suspects that your newspaper contains
a secret message, then your secrets are probably quite safe!
But what if somebody finds out, and looks carefully
at the newspaper for signs of a message. They might find the pinholes
and discover what you've written. Can you think of some ways of
making your message more secure?
You could, for example, put some extra, bogus pinhole
messages on other pages to confuse the reader. Or you could add
a written message using invisible ink.
Can you think of other ways of making your message
more secure?
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