I found the original article, which wasn't referenced, AFAIR. It appears here: CATHERINE TAYLOR CLELLAND et al: Hiding messages in DNA microdots Nature 399, 533-534 (1999) Scientific Correspondence. These guys may know about DNA, but they don't know much about crypto! To quote: "Encryption is not of primary importance in steganography, so we can use a simple substution cipher[1]...". Well, it may have been true when [1] was written (though I doubt it), but it certainly isn't now! And what is the tome in question? Yep, the fantastically modern: Kahn, D. "The Codebreakers" (Scribner, New York, 1996). The article is available at http://www.nature.com/server-java/Propub/nature/399533A0.frameset?context=toc Cheers, Ben. -- http://www.apache-ssl.org/ben.html "My grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to try to be in the first group; there was less competition there." - Indira Gandhi
