Viewing Single Post From: Brute Forcing The Adfgvx Cipher

Viewing Single Post From: Brute Forcing The Adfgvx Cipher
jdege	Apr 19 2008, 12:53 PM
Elite member Posts: 263 Group: Admin Member #246 Joined: December 7, 2006	I'd think the keyspace of ADFGVX is far too large for brute-forcing to have any chance. What I'm wondering if there are any statistical tests that would determine whether you had successfully reversed the transposition. It's a two-stage cipher, polybius-square substitution followed by columnar transposition. Is there a test we can perform on a trial solution of the transposition, that would determine we had it correct, without having had to break the substitution first? I'd be very surprised if there were not, but I don't know what it would be. Remember - this was cracked, in pre-computer days. But only occasionally, in times of high traffic. My guess is that they attacked the transposition by simultaneous anagramming of messages of identical size.
	When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.

Brute Forcing The Adfgvx Cipher · General