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Beyond the Limits
There's a file in my PICT!
Issue: 1.4 (February/March 2003)
Author: Didier Barbas
Article Description: No description available.
Article Length (in bytes): 11,469
Starting Page Number: 46
RBD Number: 1425
Resource File(s):
1425.sit Updated: Monday, October 27, 2003 at 1:31 PM
Related Link(s): None
Known Limitations: None
Excerpt of article text...
We will today play with the concept of steganography. Steganography simply takes one piece of information (a file, text, anything) and hides it within another file. Computer files, especially images, contain unused or insignificant areas of data. Steganography takes advantage of these areas, replacing them with information (encrypted mail, for instance). The files can then be exchanged without anyone knowing what really lies inside of them. An image of the Namsan Tower in Seoul could contain the recipe of Rex Stout's 'Veal birds in Casserole' or my company's latest P+L (there actually is a relationship between my company and steganography: our annual meeting and the Fifth International Workshop on Information Hiding were both held in the same hotel, but, fortunately, not at the same time...). Steganography can also be used to place a hidden 'trademark' in images, music, and software; a technique known as watermarking. Users of Photoshop sometimes use such a function to assert their intellectual property rights on a graphic artwork.
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Article copyrighted by REALbasic Developer magazine. All rights reserved.
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