In very short words steganography is a method or technique to hide some message within another message or other kind of media (like image, painting, sound etc.). The masquerade is so subtle that person not expecting to find a hidden message won’t notice anything.
With the IT era possibilities are getting bigger and bigger. You can change just a one bit of each byte in i.e. image to store (encode) hidden images and the viewer won’t notice any difference in most cases. In the same, the size of encoded image is really impressive. You can store around 175 thousand letters (or seventeen thousand typical words) in a single 800×600 pixels image!
This article describes how to write a simple Delphi / Pascal code as an example of steganography — to encode (and decode) some mysterious text message within simple bitmap.Read More “A very introduction to steganography”