From: Derek Upham <upham@cs.ubc.ca>
Date: Sun, 27 Feb 94 14:17:50 PST
To: cypherpunks@toad.com
Subject: Re standard for stegonography?
Message-ID: <199402272217.AA17024@grolsch.cs.ubc.ca>
MIME-Version: 1.0
Content-Type: text/plain


> Is there a standard for stego yet?  I just added stego and de-stego
> filters to my pbmplus image toolkit, using a simple protocol I made
> up on the spot.  Now I'm wondering if I should make them compatible
> with existing stego tools.

There appear to be two existing steganography packages for images.
One is "jsteg", a Unix-based system which stores data in JFIF-
compliant JPEG images; it is based on version 4 of the cjpeg/djpeg
package.  The other is "Stego", a Mac-based system which stores data
in Mac PICT files (I think---I don't have a Mac to examine it).

"jsteg" is available in the Cypherpunks FTP archive in the
applications subdirectory as the original jpegsrc package, plus the
patches, plus a README file.  However, you might be better off
tracking down the "Stego" sources since "jsteg" stores its data in a
rather odd way (see the docs for more information).

Derek

Derek Lynn Upham                               University of British Columbia
upham@cs.ubc.ca                                   Computer Science Department
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