Introduction to Stagonography
Well, I promised one of the attendees to my session at VSLIVE to blog something about Stagonography, a topic that I'm actively working on right now. 
So what exactly is Stagonography? If you've understood Cryptography, you'd know that cryptography is to make the plain text unreadable. So Stagonography, is a technique to hide the information.
In most cases of Stagonography applications, we'd embed the secret information into other more innocent looking mediums such as Images, MP3 files or even videos. So what we really do here is we split the bits of the secret information up and embed these bits on the Least Significant Bit (LSB) of each pixel in the image for example. Of course, there different techniques for embedding these secret documents in MP3, videos and etc.
Tools out that that you'd be able to find on the net is most probably the first generation of stagonographic techniques. However, in many research organization and government research organizations, the forth generation of stagonographic techniques are already being developed or in the process (at least).
There are several really interesting applications of Stagonography, such as a StagFS and etc. Something that Prof Tan Kian Lee (National University of Singapore) & Prof Pang HweeHwa (I2R & Singapore Management University) have published on.
Of course, I'm not going to release any source code of how this could be done just yet. However, I'd be publishing it once I'm done with one of my prototypes.
This short little entry is just a mere scratch on the surface, however, I certainly look forward to hearing your feedbacks and comments on this.
Read the complete post at http://darrensim.com/blogs/techbits/archive/2007/04/05/introduction-to-stagonography.aspx