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"Steganography Goes Digital," by Bruce Sterling. The New York Times Magazine, 9 December 2001.
This "Year in Ideas" issue includes "Steganography Goes Digital." Sterling reports on the new and improved method of hidden writing (microdots)---digital steganography. Digital pictures are made up of thousands of dots identified by your computer with a long string of numbers. Digital steganography replaces some of the bits in the characters in each stream, resulting in a picture that looks unchanged but which contains a secret payload, a hidden message. There is an illustrated example of what appears to be a digital photograph of a landscape: "Encrypted in the binary code of this digital picture is Lewis Carroll's poem The Hunting of the Snark." "Stego" messages can also be hidden inside digital music, digital text files, or even spam. However, if one examines a digital "stego" file closely, or if one logs computer keystrokes, steganography can be detected.
--- Annette Emerson
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