Related Clues:

• Needing deciphering
• Not easily read
• Encrypted
• Needing crackers, say
• Like secret messages
• Secret, as a message
• Emulated Hammurabi
• Like a cryptogram
• In secret language
• Rendered unreadable
• Hard to read
• Not easy to read
• Encrypted, as a message
• Written in a secret language
• Like some wartime messages