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First, you decrypt the first four characters. The plaintext you find is the key for the next block of four characters, so after this you can decrypt the next block, finding the key for the block after that, and so on. This means you will need a case distinction: one case for the first $|K|$ characters (where $|\dots| \stackrel{\text{def}}{=} \text{the ...


The best one i've seen actually uses SOS as a clue. RQ indicates a question, there fore you get "SOS?" this seems to hint at a pattern, and then you get a few palindromes in the decoded morse, so: everything that is symmetrical: ISI (from invisible) ESe (slightly weak due to the "e" from FORCESe) From INTERPRETATIT (I came to believe that the sentence is not ...

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