You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

In Part I, you broke a simple cipher. Now try creating a more complex cipher. Cut out the NOVA Decoder Ring and NOVA Cipher Code Ring and the window marked INDEX. You are now going to put this simple ...

A newly-developed cipher could finally shine light on how the strange text of the Voynich manuscript was devised.

A unique cipher that uses playing cards and dice to turn languages into glyphs produces text eerily similar to the glyphs in ...