Steganography, kinda pointless but curious thread. - Page 2

TheNewt · 07-24-2007 , 17:05 Re: Steganography, kinda pointless but curious thread.

Indeed it is. CRACK THE CODE

TheNewt · 07-24-2007 , 17:42 Re: Steganography, kinda pointless but curious thread.

Wow, read up on it. This paragraph was interesting.

Quote:

A difference of one or two in the intensities is imperceptible, and, in fact, a digitized picture can still look good if the least significant four bits of intensity are altered -- a change of up to 16 in the color's value. This gives plenty of space to hide a secret message. Text is usually stored with 8 bits per letter, so we could hide 1.5 letters in each pixel of the cover photo. A 640x480 pixel image, the size of a small computer monitor, can hold over 400,000 characters. That's a whole novel hidden in one modest photo!

That last bit reminds me of the saying "A picture is worth a thousand words". And I'm starting to think, damn right.

Roach · 07-24-2007 , 23:07 Re: Steganography, kinda pointless but curious thread.

Um...your "cool" insert is made of fail. It has no file extension designating the type of file it is.

stupok · 07-25-2007 , 01:09 Re: Steganography, kinda pointless but curious thread.

lolz, http://xkcd.com/54/

This is pretty incredible :O

nick123 · 07-25-2007 , 06:26 Re: Steganography, kinda pointless but curious thread.

im too dumb for this shit, tried installing it and working it but i phailed. uninstall

Pro Patria Finland · 07-25-2007 , 07:00 Re: Steganography, kinda pointless but curious thread.

README.txt FTW!

Roach · 07-25-2007 , 11:50 Re: Steganography, kinda pointless but curious thread.

Quote:

Originally Posted by stupok69

lolz, http://xkcd.com/54/

This is pretty incredible :O

Hark, he found the image!

stupok · 07-25-2007 , 12:13 Re: Steganography, kinda pointless but curious thread.

I'm not sure I really understand how steganography works... the file seems to be the same size after you embed stuff into it.

Is it actually the same size? or is the size just not recognized properly?

Also, I used PCopy to put a directory into an image, but after extracting the directory some of the image files inside were merged together and saved as a mutant file. Weird...

Lee · *Last edited by Lee; 07-25-2007 at 14:14.*

It is the same size, yes.

http://en.wikipedia.org/wiki/Stegano...odern_practice

TheNewt · 07-26-2007 , 00:30 Re: Steganography, kinda pointless but curious thread.

Quote:

Um...your "cool" insert is made of fail. It has no file extension designating the type of file it is.

Your kidding me right? I thought that would be the easy part. Add some file extensions, you'll figure it out. Trust meh.

Quote:

I'm not sure I really understand how steganography works... the file seems to be the same size after you embed stuff into it.

Is it actually the same size? or is the size just not recognized properly?

Thats the beauty of steganography. It replaces bits near white noise in pictures and sound files, so that its unnoticeable by the naked eye or ear, and since it actually replaces bits it will be the exact same size as the original picture or sound. That just makes it that much more cool