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Cryptography Challenge #19! (Fixed)
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on 2007-07-25 02:56:28 (edited 2007-08-27 21:05:42)
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Welcome to Gendou.com Cryptography Challenge #19! The goal of this game is to figure out what the secret file is, and describe its content to me in a message by clicking here. hint 1 hint 2 hint 3 47 56 46 00 28 00 00 00 19 00 00 00 04 00 00 00 00 00 03 C0 00 00 00 0F E0 00 00 00 1E 30 00 00 00 38 18 00 00 00 70 18 00 00 00 60 18 00 00 00 E0 38 00 00 00 C0 30 00 00 00 C0 70 00 00 00 C0 E0 00 07 C0 63 CF 80 18 37 7F B0 60 20 08 9E 40 10 40 05 A0 80 08 40 66 40 80 08 80 62 41 18 04 80 02 81 18 04 80 03 01 00 44 80 02 01 00 04 80 82 01 00 04 40 44 00 80 08 40 3C 00 82 08 20 08 00 40 10 18 30 00 30 60 07 C0 00 0F 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1F 00 00 00 00 FF 80 00 00 03 FF C0 00 00 07 E1 C0 07 C0 0F 80 C0 18 30 1E 01 C0 20 09 9C 07 C0 40 06 5C 3F B0 40 65 6F FF 08 80 62 BF FC 04 80 02 23 E0 04 80 02 42 18 82 80 03 82 18 02 80 82 02 00 02 40 44 01 00 04 40 3C 01 00 04 20 08 00 87 08 18 30 00 60 30 07 C0 00 1F C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 07 C0 00 00 00 18 30 00 00 00 20 08 00 00 00 40 04 00 3F E0 40 65 E0 FF F8 80 62 11 FF FC 80 02 DF E0 3E 80 02 73 80 0E 80 02 1F C0 1E 80 83 E3 FF FE 40 44 05 FF FD 40 3C 04 FF F9 20 08 02 3F E2 18 30 01 80 0C 07 C0 00 7F F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1F 00 00 00 00 FF 80 00 00 03 FF C0 00 00 07 E1 C0 07 C0 0F 80 C0 18 30 1E 01 C0 20 09 9C 07 C0 40 06 5C 3F B0 40 65 6F FF 08 80 62 BF FC 04 80 02 23 E0 04 80 02 42 18 82 80 03 82 18 02 80 82 02 00 02 40 44 01 00 04 40 3C 01 00 04 20 08 00 87 08 18 30 00 60 30 07 C0 00 1F C0Scoreboard:
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Re: Cryptography Challenge #19! (Fixed)
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| I'm seeing some nice patterns, symmetries, similarities, and the like, and I have a guess as to what type of thing the secret file is, but I don't know how to apply the magic, and I haven't conclusively worked out in what order the bytes should appear. |
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Re: Cryptography Challenge #19! (Fixed)
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on 2007-07-28 02:58:11 |
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try drawing the bits. the solution is black and white.
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Re: Cryptography Challenge #19! (Fixed)
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bah.. i can't figure out how to apply that "magic number" either.. i see some visual patterns in the actual data... but there's several ways that it can be arranged... |
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Re: Cryptography Challenge #19! (Fixed)
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on 2007-08-03 22:42:27 (edited 2007-08-03 22:42:55)
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just ignore the magic number :P its like a file identifier sort of thing
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Re: Cryptography Challenge #19! (Fixed)
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I've tried drawing the bits in several orientations, but none of them coalesced into comprehensible information. Is each element in the sequence stand-alone, or do they interact in some way to produce the information I'm aiming for? |
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Re: Cryptography Challenge #19! (Fixed)
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on 2007-08-04 00:08:22 (edited 2007-08-04 00:08:41)
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each frame is a stand-alone width=0x28 height=0x19 image. the first frame starts with: 00 80 0F 00 C0 ... this turns into: 00000000 10000000 00001111 00000000 11000000 ... or # #### ## draw the rest of the 24 rows to finish the frame.
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Re: Cryptography Challenge #19! (Fixed)
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I already did that, but it just looks like garbage to me. I guess I didn't phrase my question right. Should I be looking at each frame individually, extracting four pieces of information, and then sending (or describing) those four pieces of information to you? Or should I be looking at how different frames interact, with the information I transmit being gleaned from seeing how the frames behave in tandem? |
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Re: Cryptography Challenge #19! (Fixed)
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same here... 4 frame RAW, drawn left to right by rows top to bottom, 28 hex wide by 19 hex high, 1 bit per pixel, with no encryption... it looks like garbage to me too..... and any transition between frames looks like trash too... i've used xor, or, and |
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Re: Cryptography Challenge #19! (Fixed)
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on 2007-08-05 10:35:36 |
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it appears that, although this was inadvertent, the image is stored in columns, not rows. sorry about that!
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Re: Cryptography Challenge #19! (Fixed)
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Maybe I'm misinterpreting what you mean by that. I hear that as "put the first 25 bits in the first column, the next 25 bits in the next column, and so on." I'd already tried that, too, and it also produces what looks like garbage to me. I also tried putting the first 3 bytes in the first column, the next 3 bytes in the next column, and so on, running the last 5 bytes along the bottom row, but that doesn't look meaningful either. I tried xoring the first two frames and seeing if that looked like anything useful, and it didn't. |
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Re: Cryptography Challenge #19! (Fixed)
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on 2007-08-05 22:16:26 (edited 2007-08-05 22:38:01)
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My sincere apologies! The frame data before was garbage introduced by a suffering little bug that went un-noticed. Not to mention, it is now row-oriented instead of column-oriented, for better viewability. The new data should, quite clearly, depict something very recognizable. Sorry, you've not gone bonkers, I have!
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Re: Cryptography Challenge #19! (Fixed)
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| Thank you so much, Gendou. My head was about to explode. |
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Re: Cryptography Challenge #19! (Fixed)
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| ah, much different from the zebra stripes... |