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Hi all,
I know this is a very basic question and i shudn't be asking this but i have already searched for the defination but was not able to understand the question in a simple language.
well my question is can any body tell me in simple language "What is steganography ?"
Thanks in advance.
In.
As far as I am aware it is a form of encryption where you hide something within something else like a document inside a picture. You can still see the picture as a picture but the document is scattered around inside it.
:)
steganigraphy simply is where text is hiddden in pictures or image files.
better still
steganography :
<security> Hiding a secret message within a larger one in such
a way that others can not discern the presence or contents of
the hidden message. For example, a message might be hidden
within an image by changing the least significant bits to
be the message bits.
being an indian this might help you more,
Ankit Fadia helped FBI crack codes of images sent by members of AL-Quida.
http://www.cryptobola.com/index.htm its a site which sells a software to hide text in images but i think going around a site might be help full. http://www.cryptobola.com/index.htm
Easy way of explaining stenagraphy is by thinking about Ascii art. (No ascii art is not stenagrapy.) But you see the picture, but there are also a lot of other things there. Well that is kind of how stenagraphy is, you can see a picture and embeded in the picture is your stuff.
Code:
,--^----------,--------,-----,-------^--,
| ||||||||| `--------' | O
`+---------------------------^----------|
`\_,-------, _________________________|
/ XXXXXX /`| /
/ XXXXXX / `\ /
/ XXXXXX /\______(
/ XXXXXX /
/ XXXXXX /
(________(
`------'
If you want to learn about steganography, ask Elonka. Here is a link to a portion of her web page that deals with the very subject>>>>
ElonkaSpeaks
There have also been attempts at hiding data within mp3's as another form of steganography, for example the program MP3Stego does such. Steganography also distorts image files just a bit. The more data to hide in a image the more the distortion and the same goes for smaller and smaller images. If for example the data you wish to hide is a image, its quality will be a bit downgraded when its extracted. I'll leave the rest of the reading up to you
Hey thanks all of u .... now i think i know something about steganography. :)
Webopedia is like a dictionary for online terms and words. http://webopedia.com
the first one :
(ste-g&n-o´gr&-fē) (n.) The art and science of hiding information by embedding messages within other, seemingly harmless messages. Steganography works by replacing bits of useless or unused data in regular computer files (such as graphics, sound, text, HTML, or even floppy disks ) with bits of different, invisible information. This hidden information can be plain text, cipher text, or even images.
CTO
Darksnake said:
That is a very good point, and is well demonstrated by the examples in the link that ByTeWrangler gave you.Quote:
The more data to hide in a image the more the distortion and the same goes for smaller and smaller images.
A point that has not been raised is the complexity of the carrier. The more complex the carrier, a picture for example, the less likely the distortion is to be noticed. A good example would be the wallpapers that ship with XP. The default "green field" one is not very good. The road through the trees with Autumn (Fall) leaves on the ground is much better.
Cheers
search www.google.com
Is it really that hard? You see the same stuff written here but with a bit more info and more completed.
Wow! Great post!!! I wish I were as smart as you!Quote:
Can you share with us any more of your great wisdom?
The practice of hiding one piece of information inside of another. The most common example is watermarking.
www.msg.net/kadow/answers/s.html
Art and science of conveying information in such a way that its presence is unnoticed. It comes from the greek words steganós steganos (covered) and graptos graptos (writing), literally covered writing, in the sense of a hidden thing. In steganography the text or image in question is invisible although it resides in the interior of an apparently normal piece of other information, like a text an image or a soundtrack. Unlike cryptography where the message is clearly visible although you need the key to decipher it, in this case the information cannot be seen unless the correct procedure is applied to the text or image where it resides.
or reffer the below .........
http://www.google.co.in/search?hl=en...:Steganography
enjoy this site with happiness.........
meow
Stegonagraphy basically means hidden writing. You can actually hide data in many different file carriers; pictures, music, video, binary exe's, and more. Carrier files can be big problems. Some files are already compressed like jpg's and mp3's and they can hold less data before being identified than uncompressed formats such as bmp's and wav's. As sam2k stated Stegonagraphy's goal is to hide information and conceal the fact that it even exists. Cryptography's goal is confidentiality. Some stegonagrahy tools allow you to optionally encrypt data. If you can tell a file has been steged, then that avoids the whole purpose of hiding it.
Stegonagraphy works by using the least significant bits in the file to hide the data. As for the case of a picture, the more bits that get changed, the more distorted the image will be. This is why a carrier file can only hold a certain amount of data.
It's like a picture hidden within a picture. Wikipedia has an interesting article, where if you do a process to a PCX image file, you get a cat out of trees.
Where as cryptography is more like text cipherd.
origional message is hidden within something else in steganography whereas in encryption transposition and substitution are applied on origional message to change it to anather form.
consider a simple rule first letter of each word in a message forms origional message.
there are ways to hide a message like:
1)using a pencil to highlight a printed letter which can be seen when placed at a angle to light.
2)using a hidden ink so that u can't see that message unless u heat that paper.
3)using small pin punctures which can't be seen normally.
4) a message can be hidden by using the least significant bit of frames of a cd.
It's the art of producing a material that is blank, untill you piss on it. Where upon it turns into a map.
Crude but effective.
Oh, another example... Think of those things they sell to kids that are those red-dotted sheets of paper, along with a red-tinted "spy glasses" plastic sheet. That's a great example.