Image cypher

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Actaeus
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Image cypher

Postby Actaeus » Sun Mar 22, 2009 5:43 am UTC

cypher1.PNG
cypher1.PNG (18.48 KiB) Viewed 3117 times

Please spoiler your solutions.

Carnildo
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Re: Image cypher

Postby Carnildo » Sun Mar 22, 2009 5:54 am UTC

After about 30 seconds of work, I got this:
Spoiler:
One Million, Four Hundred Fifty Six Thousand, Nine Hundred Twenty Three

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Actaeus
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Re: Image cypher

Postby Actaeus » Sun Mar 22, 2009 5:57 am UTC

Carnildo, great. Keep working at it.

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HenryS
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Re: Image cypher

Postby HenryS » Sun Mar 22, 2009 6:25 pm UTC

Spoiler:
Tried a few things with that number, nothing jumps out... it factors as 3 x 13 x 37357, doesn't look like it's telling us a way to rearrange the pixels into some other rectangle. In hexadecimal it is 163B1B, might encode a colour but I don't see how that would be useful.

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Actaeus
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Re: Image cypher

Postby Actaeus » Sun Mar 22, 2009 7:25 pm UTC

HenryS:
Spoiler:
The solution is 31337357... it's l33t

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thc
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Re: Image cypher

Postby thc » Sun Mar 22, 2009 7:46 pm UTC

Pretty neat! Can I ask how you made it?

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HenryS
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Re: Image cypher

Postby HenryS » Sun Mar 22, 2009 8:30 pm UTC

Actaeus wrote:HenryS:
Spoiler:
The solution is 31337357... it's l33t
Spoiler:
Sorry, I must be missing how you get that from the number? It isn't base 8...

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HenryS
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Re: Image cypher

Postby HenryS » Sun Mar 22, 2009 8:32 pm UTC

Here's an entirely different image cypher (I was playing this kind of game on a different forum some time ago).
Attachments
texture_challenge4.png
texture_challenge4.png (420.16 KiB) Viewed 2956 times

crzftx
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Re: Image cypher

Postby crzftx » Mon Mar 23, 2009 8:48 am UTC

Actaeus wrote:Image
Please spoiler your solutions.


So now that the solution's out, how do you figure?

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Actaeus
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Re: Image cypher

Postby Actaeus » Mon Mar 23, 2009 1:38 pm UTC

crzftx wrote:
Actaeus wrote:Image
Please spoiler your solutions.


So now that the solution's out, how do you figure?

Huh?
HenryS wrote:
Spoiler:
Sorry, I must be missing how you get that from the number? It isn't base 8...

Spoiler:
Look at those factors again.

thc wrote:Pretty neat! Can I ask how you made it?

Spoiler:
First, I chose my 1337 number/word and split it up into primes of increasing magnitude. I multiplied them together, converted to English text, and ROT13'd. Then I took the resulting image and XOR'd it with random pixels. The result, along with the random pixels, are the ciphertext.

crzftx
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Re: Image cypher

Postby crzftx » Tue Mar 24, 2009 4:01 am UTC

Actaeus wrote:
Spoiler:
First, I chose my 1337 number/word and split it up into primes of increasing magnitude. I multiplied them together, converted to English text, and ROT13'd. Then I took the resulting image and XOR'd it with random pixels. The result, along with the random pixels, are the ciphertext.


Still lost
Spoiler:
I get up to "Bar Zvyyvba, Sbhe Uhaqerq Svsgl Fvk Gubhfnaq, Avar Uhaqerq Gjragl Guerr". Then you take the resulting image (here's the problem, what is your string to image function?) and XOR it with a random image. You posted the XOR on top and the random image on the bottom.

I can see no obvious way to convert a string to bits (considering the lengths). The string is 71 characters, while the bit pattern has 129540 bits.

Yat
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Re: Image cypher

Postby Yat » Fri Mar 27, 2009 11:24 pm UTC

crzftx, you should try and solve this puzzle before trying to do the encryption again. If you had
Spoiler:
xored the two parts of
the given image, you will see how obvious the obvious way to convert a string to an image is.


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