Bill Stewart wrote:
> >From: "Esteban Gutierrez-Moguel" <[EMAIL PROTECTED]>
> >> a solution that problem could be a cipher where a key (K1) decrypts the
> >> ciphertext to the real text and a key (K2) decrypts the ciphertext to a
> >> meaningful text, but not the real one. In that way if the police requires
> >> the key you can provide K2 and nothing is lost.
>
> Systems like this have been discussed occasionally, but nobody's got a good
> one.
> Problems include:
> - need twice as much cyphertext to store the real plaintext and the cover
> plaintext
> - software that does this encryption/decryption tends to be obvious about it,
> so if they find the software, they'll look for the hidden message.
> - Doing this without obviousness in the decryptionware is much harder -
> the cover text tends to be gibberish, and what you need is plausible
> deniability.
how about actually encrypting two texts, in such a way that they combine
into one ciphertext, and depending on which key you choose, one or the
other gets decrypted from that.
