The inspiration for this cipher stemmed from a conversation with James Aaronson, when we considered the prospect of a whole new category of cipher. I was initially sceptical as to whether it could actually be implemented (they’re certainly much harder to design than to solve), but eventually settled upon the implementation below:
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You’ll need the password (entirely lower-case, as has been the case since cipher #5) to access the solvers’ area. Good luck, and enjoy.