In a recent post here, I floated the idea that the Zodiac Killer’s Z408 (solved) cipher’s unusual homophone distribution may have arisen not conceptually (i.e. from a hitherto-unknown book on cryptography), but instead empirically (i.e. emerging from the properties of a specific text). It’s certainly possible that he might have used his own (private) text … Read More →

The post Might the Z408 Zodiac Killer Cipher be a clue to a book? appeared first on Cipher Mysteries.