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Author Topic: I just posted kiddy porn on this BBS!  (Read 24327 times)

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Alex Libman

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I just posted kiddy porn on this BBS!
« on: November 02, 2008, 09:58:00 PM »

Or did IThe world may never know...   8)

However, if you're geeky enough, you might be able to figure this outNotice how my recent posts all look weirdWell, if you look at the source code (i.e. click "QUOTE"), you will notice a lot of extra formatting tagsTheir visual effect is very subtle, but they are there for a reasonThere is a bitstream hiding in themYou'll notice that some tags (only those which are auto-generated by my script) contain random casing: that's one place where the bits are hiddenAnother place is the font color codes: notice that there are up to four color categories (normal, vowels, numbers, and punctuation): some may be turned off automatically to fit the data into the 20,000 character per-post limitEach of them starts with a particular color, but sometimes this color shifts subtly: that's another place the bits are hidden.

Messages that contain fewer than 32 bits are useless, because that's the header identifying where those bits belong (i.e. position in a file).  The rest of the bits are the data.  (Notice that if I'm quoting a message from someone else, which could include a message quoted from me, it could include tags that look to contain the bitstream but could contain garbage that throws off your decoder script.)  If the bitstream reaches the end of file, there will be an EOF (end-of-file) control character (8 bits), followed by another 32-bit address like in the beginning, followed by another bitstream.

I've already put through one small JPEG file, and ran a script to piece it together againMore than once, actually, because indicating the file position in every message makes harmless repetition possible, which also works as a redundancy check and it makes no difference in which order the bitstream chunks are processed.

So, um, enjoy.
  :lol:
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orion

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Re: I just posted kiddy porn on this BBS!
« Reply #1 on: November 02, 2008, 10:01:49 PM »

I am so jealous of the free time you have to waste on useless projects.
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MacFall

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Re: I just posted kiddy porn on this BBS!
« Reply #2 on: November 02, 2008, 10:19:46 PM »

I have no idea what you just said
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Alex Libman

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Re: I just posted kiddy porn on this BBS!
« Reply #3 on: November 02, 2008, 10:27:12 PM »

... if you're geeky enough ...

   ^^^   hint  ;)
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digitalfour

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Re: I just posted kiddy porn on this BBS!
« Reply #4 on: November 02, 2008, 10:35:01 PM »

Pretty cool. Why don't you publish the scripts?
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YixilTesiphon

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Re: I just posted kiddy porn on this BBS!
« Reply #5 on: November 02, 2008, 10:38:55 PM »

Pretty cool. Why don't you publish the scripts?

Because he's full of shit, and under the impression that stated IQ of 155 (which isn't that impressive) makes him not have to work, which as far as I can tell he doesn't.
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Alex Libman

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Re: I just posted kiddy porn on this BBS!
« Reply #6 on: November 02, 2008, 10:47:32 PM »

Um, that's 0x155:lol:

Seriously, 155 is smarter than 99.98%...  Or at least better at cheating.  8)


Pretty cool. Why don't you publish the scripts?

Um, hello...  I'd be arrested!

« Last Edit: November 02, 2008, 10:56:33 PM by Alex Libman »
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BonerJoe

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Re: I just posted kiddy porn on this BBS!
« Reply #7 on: November 02, 2008, 11:13:46 PM »

Ignored.
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sillyperson

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Re: I just posted kiddy porn on this BBS!
« Reply #8 on: November 03, 2008, 11:10:53 AM »

Color me impressed.
I'd like to see the scripts. Wouldn't be too hard in Perl (then again, nothing is too hard in Perl).

Alex Libman

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Re: I just posted kiddy porn on this BBS!
« Reply #9 on: November 03, 2008, 12:06:12 PM »

I can't show you the script I'm using now because (1) it's silly, (2) you'd be able to decode what I've been hiding thus-far, and (3) it uses some fancier-than-needed obfuscation math that I'd rather keep to myselfPlus the one I'm using is just a demo, it's not optimized to hide as much data as possible - it doesn't even encode any casing bits in the closing color / font tags, simply duplicating the casing of the opening tag.

If I was writing a script from scratch and wanted to fit in as much data as possible, I'd just have it insert all bunch of empty {color=#abcdef}{/color} tags, filling the post up to the allowed character limit with no visible changes to the viewer (until the message is quoted).  The deciphering script could ignore all tags except the empty color ones for simplicity, or you could have the encoding script change the casing of any normal tags you use, minus the URL'sEach instance of the word "color" stores 5 bits based on casing, and each hex color value is 24 bits, so it's 34 bits per tagThis is clearly meant to smuggle secret messages, not files, but my ~30 posts per day average would allow a small photo to be hidden in text every dayIn fact, assuming a 20,000 character limit, you could fit the maximum of 3.61 KB of data into just one post that appears blank to the user - but then it's obvious that you're hiding something, you might as well post an encrypted base64 dump via background color hiding / size=0:roll:

The trick is to hide the data in formatting tags that "beautify" your post, so you could claim to be doing it for aesthetic reasons alone, and most people will not inquire into your subtle color shifts or weird tag casing furtherLike if I didn't start this thread (and used a prettier font face), most people would probably just ignore the formatting tags when they quote my messages, thinking I was just being stylistically eccentricThe problem is that changing each character to a random color would make your post completely unreadable: you have to limit your range just to colors that contrast with the backgroundUsing round (in base 16) numbers you could easily limit each color value to storing 8 bits of data, but you can use fancier math tricks for variable data significanceThe one I'm using is puny: it almost looks simply like a common script to make vowels / numbers / punctuation a different color, but each octet of those colors changes by X every time the color is used - the bitstream hides therein.


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Lindsey

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Re: I just posted kiddy porn on this BBS!
« Reply #10 on: November 03, 2008, 12:23:11 PM »

I don't really have that much trouble reading it.  With most of it I highlight his text and read it easily, but I can see it without.   :shock:
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Alex Libman

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Re: I just posted kiddy porn on this BBS!
« Reply #11 on: November 03, 2008, 12:31:20 PM »



44 65 61 72 20 4d 72 20 43 79 72 6f 3a 20 49 20 61 70 70 72 65 63 69 61 74 65
20 74 68 65 20 61 6
e 6e 6f 79 61 6e 63 65 20 63 61 75 73 65 64 20 62 79 20 74
68 69 73 20 6
c 69 74 74 6c 65 20 73 6f 63 69 61 6c 20 65 78 70 65 72 69 6d 65
6
e 74 2c 20 61 6e 64 20 69 74 20 77 69 6c 6c 20 62 65 20 6f 76 65 72 20 69 6e
20 61 20 66 65 77 20 6d 6f 72 65 20 64 61 79 73 2e 20 20 49 20 77 69 6c 6c 20
6
e 6f 74 20 22 73 68 75 74 20 74 68 65 20 66 75 63 6b 20 75 70 22 2c 20 62 75
74 20 79 6
f 75 27 72 65 20 66 72 65 65 20 74 6f 20 69 67 6e 6f 72 65 20 6d 65
20 69 66 20 79 6
f 75 20 6c 69 6b 65 2e 20 20 50 65 61 63 65 2e



In case no one told you, allow me to be the first:  It looks like shit.

You're using the dark-bg theme, rightIf not, please post a screen-shotIt could be that the Terminal font is different on different OS'es...
« Last Edit: November 03, 2008, 12:35:16 PM by Alex Libman »
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Alex Libman

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Re: I just posted kiddy porn on this BBS!
« Reply #12 on: November 03, 2008, 01:03:17 PM »

Cyro, sir... 

Please don't hurt me!  :cry:

OK, ok, I'll stop with the hidden kiddy porn.  Rejoice, O merry forum, for thy hero Cyro saveth thee from my evil hex!



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Lindsey

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Re: I just posted kiddy porn on this BBS!
« Reply #13 on: November 03, 2008, 01:08:45 PM »

Okay, who do I thank with what for Libman ceasing the posting of potentially disturbing material? 
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Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we.
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Lindsey

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Re: I just posted kiddy porn on this BBS!
« Reply #14 on: November 03, 2008, 01:10:39 PM »

Okay, who do I thank with what for Libman ceasing the posting of potentially disturbing material? 

Me and you know what.

Excellent.  I'm booking the plane ticket as we speak.   :lol:
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Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we.
         -George W. Bush
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