Related Clues:

• Starts to engage underground cell to put messages into code
• Make it difficult to work out for prince freaking out over hotel key
• Use an Enigma machine, say
• Awful pity Cern has no one to encode data
• Byzantine hen price code
• Scramble and vault on walls of Eton
• Letter to lament exercising disguise for security
• Code for that man in Pincer Movement
• Encode resetting PC entry
• Prince confused about His Excellency’s code
• Protect from theft, in a way
• Put in code
• Put information into code in French vault
• Timeless, The Prince could reveal code
• Convert to a cryptograph