How does steponagraphy work?

[Solaris9]

What is steganography?

I understand that is hides text in a picture or sound but I am not quite right on how it works. If someone could help me that'd be the greatest.

[Gurl]

You might want to refer to these sites for further info:

http://www.cs.uct.ac.za/courses/CS400W/NIS/papers99/dsellars/stego.html

http://home.ecn.ab.ca/~jsavard/crypto/mi0604.htm

http://www.earthweb.com/article/0,,10456_624101,00.html

Hope this helps! :)

[doktorf00bar]

Steganography is the act of hiding one piece of information in another, so to speak. If I send you an email that seems like its a coherent discussion about the weather, but if you take each 10th letter and it spells out another message, something we'd rather keep hidden, that is essentially a form of steganography. There is software available that can do this sort of thing in the byte-stream of a file.i.e a jpeg that has a message within it. If you're interested in that sort of thing, a quick search of Google would be fruitful. The right to use cryptography and related technology like steganography is something I take seriously. If more people used this software, and stood up for our rights to use it, I think the world would be freer place, but thats just my 2 cents...

[cwk9]

Steponaraphy is simply hiding data in a form that isn't obvious. The idea is that the message can't be decrypted if no one knows it’s even been sent. I once tried to make a steponaraphy program that would hide text in a bitmap file (never could get it to decrypt though). Each pixel of a bit map is made out of three numbers (assuming it’s not black and white) one for red one for green and one for blue. This is commonly referred to as RGB. So the data to represent a pixel would look like this (145,36,255) <- note numbers have to be between 1 and 255. The program would simply change the last number to represent a letter ex. 234 would equal "t" or something. This caused some slight discoloration of the image but with a small message you could store it in the first row of pixels and no would notice it unless the image hade lots of very light or very dark colors.

[Solaris9]

I think Gurl's idea was one of the best. but thanks guys. I never had tried google before but I found a way to write my steg program. I am going to get binary of each RGB(138, 240, 110) then modify the last bit (0, 1) to 'save' my text

thanks all....
I LUV YOU GURL!

[The Old Man]

Solaris9: Read every third word, it's one simple example of hidden text.
When you look very long at the new gurls next door, answer this question; do you think you see or know what you now see? :D

[Solaris9]

thax for the example

[phaza7]

Ah! That's how it works. Time to learn more, wonder if there are any coding related sites dealing with this.

[optiq]

I personally prefer the audio and fractal approach to stenography. But good luck solaris, let me know how it turns out?