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Photoshop, Steganograhy, and cypherpunks?
> > 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":
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?
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?