The Secret Code Isn't xxxx

A world-famous cryptographer has vanished without a trace. She spent years creating an unbreakable security system - and now, in a cruel twist of irony, unlocking that system is the only way to find her.

Witness statements from those closest to her reveal someone who was paranoid and very well connected - but what was she hiding? When a secret file marked 'X' is discovered, it opens with a simple message: 'The secret code is not xxx'. Within the folder is a list of names and 12 cryptic clues. Somewhere among40,000 possible codeslies the one sequence that unlocks the truth - and where she may be.

But here's the catch. Each clue reveals not what the codeis, but what itisn't. Using logic, deduction and a trail of increasingly revealing clues, you'll eliminate thousands of possibilities, narrow the field and uncover the only code that fits every piece of evidence.

Can you follow the clues, crack the case and reveal the secret cipher before it's lost forever?