The class will bedivided into four groups that will devise methods for enciphering English text and construct cryptograms in accord with these methods; each group will then attempt to decipher the others' cryptograms. Groups will document their work by writing a joint paper that describes both their own cryptographic system and their attempts to decipher the other groups' cryptograms, explaining the techniques and methods of cryptanalysis they used. Both the cryptograms and the papers will be posted on the class website; as a result, they should be submitted in either plain text or html format, on a floppy disk or by email.