Viewing Single Post From: Brute Forcing The Adfgvx Cipher

Viewing Single Post From: Brute Forcing The Adfgvx Cipher
jdege	Mar 20 2009, 01:40 PM
Elite member Posts: 263 Group: Admin Member #246 Joined: December 7, 2006	osric Mar 20 2009, 07:41 AM jdege, As described above, with log tetragraphs. I am not clear what the best performance achieved by the group is, in terms of message brevity, size of square, width of transposition key, length of crib used (if any) and solving time. Could you update me on this? I'm not sure that anyone other than Revelation has actually tried this. It's on my list, but there's a lot in front of it. As for your "log tetragraphs", I understand, and have used, log tratragraphs in hillclimbers. But that was in single-stage encryptions. Where I could compare the tetragraph statistics of the provisional plaintext to the statistics of ordinary text. And that's not the case, here. If you correctly reverse the transposition, you are left with a ciphertext - enciphered with a simple substitution. These aren't hard to break, but first you have to recognize that you have correctly reversed the transposition. You can't do that by comparing the contact statistics of the ciphertext with ordinary text. Not directly., because of the remaining substitution Or at least, I'd not expect it to work.
	When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.

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