Impressive, very impressive—and yet, once you think about it, not so complicated. Check out this picture (180 KB, stolen from A. L.) and either press Ctrl-A on Internet Explorer, on save it and display it at half it size. (Caution: not work safe, as they say.) It’s certainly a very basic trick, that anyone with the slightest interest in steganography ought to know, but it’s still impressive, and magically visual. If you have Explorer 6, you can also click the button that resizes the image to accomodate the browser window, and then resize the window at will to see the effect in real time: it’s even more fun.
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