I wrote a quick little version to stick bits in the LSB of a file. It runs in the Macintosh as an added feature to a popular program, NIH Image. (The source code and frequent revision are published at the major ftp sites.) It is very easy to add a function to handle this process because all of the file i/o and format decoding are already present. If anyone would like a copy, they're welcome to write to me. I'll send them instructions and a short file. Alas, it only handles 8 bit images. Also, you can also request Mimic function code for hiding messages in text with a grammar. -Peter Wayner (pcw@access.digex.com)