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XOR (Posted on 2005-10-22) Difficulty: 2 of 5
What 10 letter word corresponds to the below statement?

Skanky Fora Merscort Frailear Zigiondoup.

(Hint: The words are independent from each other.)

See The Solution Submitted by Gamer    
Rating: 3.8000 (5 votes)

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A different idea | Comment 9 of 27 |
I wonder if using an operation other than XOR on the bit representations of pairs of letters would lead to "the other half" of the message.  Perhaps AND, OR, NAND etc. 

 For the sake of argument suppose this bit operator is called "XYZ".   The idea here is that I'm guessing Gamer split the plaintext into two halves.  So far, Charlie has found the "first 18 letters" of the plaintext by using the XOR operator on the 36 letter ciphertext, two letters at a time:
s XOR k = x
a XOR n = o
k XOR y = r

suppose the first 3 letters of "the second half" of the message are "asp", which I'm picking at random.  (It's another snake name, and snakes are fun).  Then our mythical bit operator would result in:
s XYZ k = a
a XYZ n = s
k XYZ y = p

So to use this encryption method to encode, say, a 36 letter plaintext, Gamer would have needed to find two letters (in this case "s" and "k") such that XOR'ing them gives the first letter ("x") and XYZ'ing them gives the 19th letter ("a").

Unfortunately, I don't think this would work in general unless the XOR and XYZ operators were completely independent of each other.  Anyone care to weigh in on this idea?

  Posted by Larry on 2005-10-23 18:07:47
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