With this fun challenge, brought to you in partnership with the Science Museum Group, you and your child can learn how to make a cipher wheel together and use it to send secret messages to one ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher.

It's possible to make a 'cipher wheel' that represents how many steps shifted a cipher is, making it a little easier to translate an encrypted message back into something readable. You can ...