The mechanics of the Double Playfair are involved enough that it is expected that solving this cipher would be most readily achieved by a computer program that recovers the first square by shifting ...
The PlayFair DRM-cracking code for iTunes has been removed from SourceForge but is available on a server in India. Sounds like Apple may have made some legal threats. [Via Boing Boing] ...
We can use similar hypotheses and deductions to complete the square recovery to find that FINAL VICTORY is the keyphrase, written in a spiral: F I N A L H K M P V G X Z Q C E W U S T D B Y R O ...
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