Quotes About Steganography

Encrypted digital watermarking," explains Balthazar. "Information gets hidden in information, like a code inside the pixels. Only visible with the right kind of key. It's called steganography. Here," pointing at the cylinder, "they're using a similar technique, but done at the nano-level, with DNA as the information carrier. GFP is green fluorescent protein, in this case jellyfish genes woven into the atoms of the metal. The heat from your hand is the key.

Another steganographic system was still in use in the 20th century: Aeneas suggested pricking holes in a book or other document above or below the letters of the secret message. German spies used this very system in World War I, and used it with a slight modification in World War II—dotting the letters of newspapers with invisible ink.