On Sun, 8 Sep 1996 16:16:58 -0400 (EDT), Jason Vagner wrote:
1) If I hide some PGP encrypted data in a gif, jpg or wav file will there be any tell tale signs to the naked eye of an expert? If yes, what are they? If you stego too many bits in a figure, it may become apparent.
The new version of Photoshop coming out this fall includes the ability to embed "digital watermarking":
(from http://www.news.com/News/Item/0,4,3188,00.html:
Digital watermarking adds copyright information to a photograph that doesn't alter the photo's appearance. The watermark is detectable even after the photo is edited or printed and rescanned.
Question: Will stegonagrphying (?) the picture with noise mar the watermark? Will a digital signature *and* something embedded into the graphic through steganography seriosly affect a 24-bit image?
Most certainly; the idea here is that watermarking should show that an image is unedited.
Furthermore: What about browsers? Could cookies or binary info be embedded into images on the fly so that a java applet could preserve information or states between pages, of different sites?
Of course. You could do a cookie type implementation with a Java applet easily. - "'Anonymity is bad,' says a source who wishes to remain anonymous." - Nuff' said. * Home: Chris Adams <adamsc@io-online.com> | http://www.io-online.com/adamsc/adamsc.htp * Autoresponder: send email w/subject of "send resume" or "send PGPKEY" * Work: cadams@acucobol.com | V.M. (619)515-4894 | (619)689-6579 * Member in good standing of the GNU whirled hors d'oeuvre