Related Clues:

• Secret writing
• Body of law
• See 11 Down
• It takes brains to crack it
• Make unreadable, for security
• Word with fire or area
• ___ red
• 'The Da Vinci --'
• Morse ___
• Computer programmer's work
• Cryptoquote, really
• Morse's creation
• Convert to dots and dashes
• Make hard to figure out
• What a spy may write in