Related Clues:

• Cypher
• Encrypt
• System of words arrangement for secrecy
• Official code of conduct for a group
• After a century the poet writes it in a secret way
• See, the poetry is hard to decipher
• Symbolically, in E this will keep Pa in control
• What a blow to have this id the doze, by the sound of it!
• After a century the verse may need to be deciphered
• Do some computer programming
• You might crack one with your brain
• Safety standards
• DPEF off by one, for example!
• What programmers write
• "Bar" or "airport" follower