Related Clues:

• Like secret messages
• Secret, as a message
• Emulated Hammurabi
• Like a cryptogram
• In secret language
• Not easy to read
• Encrypted, as a message
• Like some wartime messages
• Put into bars, say
• Enciphered
• Encrypted, prearranged for secrecy
• Hard to read, maybe
• Wrote an app
• Wrote software
• Hard to crack