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bio website about.me/christiangeek
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visits member for 1 year, 7 months
seen Feb 25 '13 at 16:51

Trail of stardust leading to the superstar


Feb
15
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
the PT Key was aligned under the letter 'q' instead of 'a' so that was probably the curve ball. My hill climber was based on the I.C. so even though the output was scrambled and did not appear to be PT, it had the same I.C. as PT so I then knew I needed to descramble it to recover the PT (based on that method I posted in my OP). After that and some massaging of the CT key, I could work backwards to reconstruct the tableau.
Feb
14
awarded  Scholar
Feb
14
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
So your comment about the hill-climbing algorithm helped. I created a dictionary attack along the lines of a hill climber and it returned: REJOICE, which I then was able to figure out that the actual CT key was: REJOINS.
Feb
14
accepted What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
Feb
6
awarded  Student
Feb
6
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
yes that looks right, sorry I was looking at some work I had done on it instead of the original.
Feb
5
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
I could not get the crib to line up correctly using XSPYFR as the key
Feb
4
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
yes the key that is missing is the corresponding key to DRUMROL(L) in the example
Feb
4
comment What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
a valid suggestion, I updated my question
Feb
4
revised What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
edited to reflect commenter's suggestion for more cipher details
Feb
4
revised What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
grammar
Feb
4
awarded  Editor
Feb
4
revised What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?
added 92 characters in body
Feb
4
asked What are some approaches to attack an triple key polyalphabetic cipher when the IV key and PT key are known?