Adam Back <[EMAIL PROTECTED]>:
> On how to stego pgp messages. First you have to ensure that the data
> you are stegoing has a rectangular distribution [...]
[...]
> It might be nice to update stealth-2 for openPGP / pgp5. There you
> have the additional task of coping with Elgamal key exchange
On how to stego pgp messages. First you have to ensure that the data
you are stegoing has a rectangular distribution with even probability
of {0,1} for each bit, and apply your stego technique. Various ideas
have been discussed, but as anonymous suggests this has all been
worked out for PGP 2.x
Bill Frantz writes:
> It seems to me you could use an existing public key infrastructure, e.g.
> PGP, but build a different message format with the stego requirements in
> mind. Off the top of my head (using PGP 2.6):
>
> (size, data)
> (256, key) - RSA encrypted key padded with pseudo-random pa
At 9:42 AM -0700 6/29/99, Russell Nelson wrote:
>So you've got a chicken-and-egg problem -- you have to have yet
>another set of public keys for your stego crypto algorithm.
It seems to me you could use an existing public key infrastructure, e.g.
PGP, but build a different message format with the
--
> From: David Honig <[EMAIL PROTECTED]>
> To: Jay Holovacs <[EMAIL PROTECTED]>; Russell Nelson <[EMAIL PROTECTED]>;
[EMAIL PROTECTED]
> Subject: Re: Eason/Kawaguchi stego
>
> \begin{nuance}
> Except that encrypted LSBs will be perfectly uniformly
Russell Nelson wrote:
>You can't just take the output of one of those crypto systems and stuff
>it into the "random" bits of a real-life sample. There's too much
>plaintext for the stego to hide. Stego needs a special type of
>cryptography that has no known plaintext in its encrypted output --
At 12:20 PM 6/29/99 -0400, Jay Holovacs wrote:
>But if data is properly encrypted first, noise extracted from any picture
>should be virtually indistinguishable from encrypted data. Stego is really
\begin{nuance}
Except that encrypted LSBs will be perfectly uniformly distributed
and normal noise
--
> From: Russell Nelson <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: Eason/Kawaguchi stego
> Date: Tuesday, June 29, 1999 9:27 AM
>
> . Also, only a
> few parameters are needed to retrieve the information, so anybody with
> the appropriate
Jay Holovacs writes:
> --
> > From: Russell Nelson <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED]
> > Subject: Eason/Kawaguchi stego
> > Date: Tuesday, June 29, 1999 9:27 AM
> >
> > . Also, only a
> > few parameters are needed to
There's an EETimes article on Eason/Kawaguchi stego in the 6/28 issue.
They hide their bits in the most complex parts of the image -- where
neighboring pixels are most different from one another. Also, only a
few parameters are needed to retrieve the information, so anybody with
the approp
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