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Full Version: What lies between shadow and light: Hints and solution
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Here I will post some hints to solving the puzzle and later a walkthrough.
Here are hints for each part to give you a good idea of what to do:

Spoiler below!

1) The anagrammed text hints at Fibonacci sequence. Bloody_Eugene posted the unscrambled text: "These hole digging critters have a population that increase rapidly. There must be a way to track this development and make the infestation come to an end." (The Fibonacci sequence describes the increase in rabbit populations.) In the Fibonacci sequence, each term is the sum of the previous two terms. The standard sequence starts with the seeds 1,1 and goes 1,1,2,3,5,8,13,21,34……

2) For the transformations listed:
T -> B
C -> C
Q -> H

Villane observed
20 T -> B 2 ( 2+0 = 2 )
3 C -> C 3 ( 3=3 )
17 Q -> H 8 (1+7 = 8)
In other words, change a number to the sum of its digits. You could also view this as applying MOD 9 if that’s easier for Excel or yourself. But there is one slight difference. Now what do you do with this transformation? Do not apply it to the cipher text! Apply it to some numbers you will have.

3) Silently evil emerged darkness.
kenji.nanashi noticed the initial letters spell “SEED”. This means that the answers to the next two sequences are the seeds for a Fibonacci sequence.

3, 9, 7, 4, 8, 9, 5, 7, 11, 6, 6, 13, 7,
8, 6, 9, 6, 11, 8, 13, 10, 15, 8, 11, 4, 9,

Bloody_Eugene posted a solve to the first sequence, break it up by every third number:
So the next number in the sequence was identified as 5, which is the first Fibonacci seed. The next sequence may not have been solved completely. Spukrian and I posted possible reasons why the next number could be 6 but I’m not sure if they were valid. But by trial and error, I determined that 6 was indeed the second seed.

Now you have a key. Hint from Thomas: Less-safe-procedural-Vernam.
A Vernam cipher adds a random sequence key (for safe procedure) or a generated sequence (less safe) to text to be enciphered.

Can someone post an actual solution for those of us who haven't taken any classes on the mathematics required to solve even half of this.
I agree. Those "hints" doesn't lead anywhere, and seem to be solveable ONLY if you are mathematic professor. I'am not. And i'am not going back to school because of this. No way!!Tongue:
Just tell the answer and put it in spoiler tags... Though warn it above the spoiler that it's the answer but after that, if someone doesn't want to know the answer and still opens the tag, it's his/her own fault.
OK, here is a walkthrough for those who are not inclined to work on the process anymore:
!! The decrypted cipher text follows !!
Spoiler below!

The Fibonacci series with seeds of 5,6 is
but add the digits together of each term (28 -> 2+8 -> 10 -> 1+0 -> 1)
OR use mod 9 but translate 0 to 9
Gives us the key:

Translate the cipher text to numbers where A=0, B=1:

Now SUBTRACT the key from the cipher text, but of course MOD 26 – so if the result is less than 26, add 26 back to it.
The decrypted numbers are:
Now just translate the numbers back to letters:

The final message is:

So now you know the answer right Wink well, there is one more step – can you see the hidden message?
Spoiler below!
the sacred oath is broken baby
At last...
(08-31-2009, 02:34 PM)mmammel Wrote: [ -> ]
Spoiler below!

The Fibonacci series with seeds of 5,6 is
but add the digits together of each term (28 -> 2+8 -> 10 -> 1+0 -> 1)
OR use mod 9 but translate 0 to 9

Spoiler below!
Also, if anyone uses software to solve it (i wrote a small Scala program) make sure you use big integers when constructing the Fibonacci series, unless you mod 9 immediately when constructing the sequence. ints and longs aren't enough.

I'm wondering about the other sequence of numbers given in the puzzle: was it a red herring? I didn't find any use for it, both of the keys came from the first sequence.

Finally! I tried and tried the whole evening, and finally i got it.Big Grin:

Fun fact: Before the last hint from mammel, i tried the words THE SACRED OATH. Damn i was so close already!
So what is the final answer?
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