The following two messages are believed to be the same message.

• c1a.crp
• c2b.crp
• Solution:
  • Plain text
  • Keys

The following message was encrypted with a columnar transposition then a mixed plain cipher sequence and is believed to contain the text maxwellho.

• c2.crp
• Solution:
  • Plain text
  • Keys

The following message is encoded by a new method. Both messages are the same just with different keys used as per the requirements.

• c3a.crp
• c3b.crp
• Example:
  • Mono-key: jrncoaplvfdxzuwsmbitqkhgey
  • Keyword: MyDog
  • Plain text: c3_example.pln
  • Encrypted text: c3_example.crp
• Utility Items:
  • Scheme code to encrypt/decrypt
• Solution:
  • Plain text
  • Keys

jwalker@cs.oberlin.edu