Viewing Single Post From: Transposition Cipher Cracker (c++)

Viewing Single Post From: Transposition Cipher Cracker (c++)
jdege	Jul 5 2009, 02:40 PM
Elite member Posts: 263 Group: Admin Member #246 Joined: December 7, 2006	The program he posted uses the crib to test for success. In the absence of a crib, it has no way to recognize that it has found a solution. It'd not be difficult to replace testing the trial decrypts against the crib with testing against the statistical properties of ordinary text, but I've not done it. And my guess is that the test would take longer, making the program slower. As for how long to solve a period 20 columnar? The answer is never. If it takes three seconds to crack a period 10 columnar, it'd take more than 7000 years to crack a period 20 columnar. You'd either need to throw some serious hardware at the problem, or choose a different approach.
	When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.

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