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 cipher is an incredibLe code system that is both difficult to decrypt without a computer and easily solvable by hand. You might be familiar with the Cryptoquip in the comics section of a ...

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 ...